Bing holds 4% of desktop search in France and 9% in the US in Q4 2025 according to StatCounter, far behind Google. But when you buy Microsoft Ads, you're not only paying for Bing: your ads also run on Yahoo Search, AOL and DuckDuckGo, which together represent meaningful incremental volume depending on the vertical.
This mechanical detail matters. Many advertisers discover after 3 months, looking at the Website URL report, that 12 to 18% of their clicks aren't coming from Bing at all, but from DuckDuckGo, Yahoo or MSN. Understanding this map changes how you read performance and helps avoid bad calls — like excluding DuckDuckGo because you think it under-performs, when you simply haven't looked at its isolated conversion rate. This article breaks down the Microsoft network engine by engine, explains who's behind each audience, and asks the real question: should you segment by engine or let the algorithm arbitrate? For broader context, see our Microsoft Ads vs Google Ads 2026 comparison.
Microsoft Ads doesn't only run on Bing: the full map
Microsoft Ads is a multi-engine ad network. At the core, Bing provides the search index and the bulk of the traffic. But Microsoft also monetizes a set of partner engines (Yahoo Search, AOL Search, DuckDuckGo) plus its own internal surfaces (MSN, Outlook.com, Windows Search, Edge). When you pay for an impression, it can land anywhere in this ecosystem, depending on the query, location and user profile.
Microsoft's official term for this mesh is the "Microsoft Advertising Network", sometimes split into "Owned & Operated" (Bing, MSN, Outlook) and "Syndicated Search Partners" (Yahoo, AOL, DuckDuckGo, other confidential partners). As an advertiser, you pay the same CPC regardless of the serving point, and the platform shares revenue with the partner engine that served the query. For you, this is hidden complexity: by default, you only see a single aggregated metric. To compare your CPC against 2026 France medians by vertical, our France CPC calculator gives the result instantly.
This integration has an important implication: Microsoft Ads targeting covers all network engines by default. You can't say "run only on Bing." You can however individually exclude an under-performing partner domain via the Website URL report. Official documentation in Microsoft Advertising help.
Reading the table: Bing remains largely dominant in France (around 80 to 90% of Microsoft Ads impressions depending on vertical on accounts observed in public benchmarks). Partner engines bring a useful but minor complement, with conversions slightly below Bing on average — in most cases, the gap sits between 10 and 25% depending on vertical and the quality of your tracking on partner domains.
Bing: the core engine of the Microsoft ecosystem
Bing is Microsoft's search engine, launched in 2009 as a replacement for Live Search. It serves both as a public interface (bing.com) and as the underlying engine for many Microsoft products (Windows Search, Edge default search, historically Cortana, Copilot Search since 2024). It's what brings the bulk of Microsoft Ads volume.
In France, Bing holds about 4% of desktop search in Q4 2025 according to StatCounter, roughly 1/20th of Google's volume. On mobile, its share drops to about 1%, since mobile is largely dominated by Google via Android and Safari iOS using Google by default. Bing nonetheless shines in corporate environments: it remains the default engine on Windows 10/11 in the taskbar and on Edge at install, making it dominant among enterprise users who haven't changed their default setting.
The Bing audience in France is therefore structurally more "corporate" and older than the average. B2B and SaaS advertisers often find particularly favorable ground there: the typical enterprise decision-maker opens Edge, types a query, and lands on Bing without thinking. For a B2B SaaS account, you often see a higher conversion rate on Bing than on Google Ads, sometimes 20 to 35% higher depending on tracking maturity and landing page quality. See our Microsoft Ads strategy for B2B SaaS.
The other structural element: Bing has integrated Copilot, Microsoft's generative assistant, into its search interface. This opens new ad inventory in AI-generated answers — an emerging topic we cover in our article on Copilot and Microsoft Ads.
On device split, Bing in France is overwhelmingly desktop: around 80 to 88% of Microsoft Ads impressions depending on vertical on the accounts we track, against a global search average that's typically the inverse (mobile-dominant). This has two practical consequences for an advertiser. First, your landing pages must be flawless on desktop above all — wide-column forms, large-screen video formats, checkout flows designed for mouse-keyboard use. Second, device bid adjustments can be more profitable on Bing than on Google: a -20% on mobile on Bing loses almost no volume but improves average CPA when mobile under-converts.
Another often-ignored point: SERP quality on Bing in 2026. Microsoft has invested heavily in the results experience with Copilot integration, multimedia answers and generative answer blocks. For an advertiser, this means organic positions 1-3 capture a larger share of clicks than on Google, and Search ads benefit from a positive halo effect when above the fold. Polishing ad quality (Quality Score, ad extensions, sitelinks) therefore has a particularly strong return on Bing compared to Google.
Yahoo Search: residual but qualified audience
Yahoo Search is a long-standing Microsoft partner engine. Since the 2009 partnership (renewed multiple times), Yahoo Search has technically been powered by Bing: when you type a query on yahoo.fr, it's the Bing index responding behind the scenes, and the ads served come from Microsoft Ads. Yahoo keeps its own interface and audience, but under the hood the ad mechanics are identical.
In France, Yahoo Search desktop share is about 0.7% according to StatCounter Q4 2025. That's low but non-zero, and the audience has an interesting profile: older (45+ dominant), still active on Yahoo Mail and Yahoo Finance portals, with strong loyalty to the engine. The typical Yahoo France user is often a long-time user who hasn't changed their default engine in 15 years.
For an advertiser, this translates into a few observable characteristics. Intent is slightly more oriented toward info/news/finance than on Bing, which can dilute conversion on highly transactional verticals (fast-fashion e-commerce, for example). On the other hand, on products tied to finance, insurance, senior health or packaged travel, Yahoo sometimes captures an over-converting audience compared to pure Bing. The general rule: leave it on by default, monitor the Website URL report after 60 days, and exclude Yahoo only if its CPA exceeds Bing's by more than 30% on the same ad group.
A point often overlooked on Yahoo: the reach of the Yahoo Mail portal in daily usage. Many Yahoo users don't actively use the search engine but land back on it from the mail.yahoo.com homepage after checking their inbox. This explains why Yahoo traffic peaks concentrate in mid-morning and late afternoon — windows when the user opens their inbox and drifts into a practical search. For an advertiser in personal services, home repair, or recurring financial products, those time windows often convert above average — a detail to validate via the hourly report after 30 days.
On Yahoo France SERP quality, the interface has evolved much less than Bing: it remains denser, with a less modern visual hierarchy. This can paradoxically serve the advertiser: the top ad block captures a higher share-of-voice, because it occupies more visual real estate than on Bing 2026. Average CTR on Yahoo is typically 0.5 to 1.2 points above what's seen on pure Bing for equivalent ads, according to accounts observed in public benchmarks. At equal position, the Yahoo user clicks more, but converts slightly less — which generally balances out on the final CPA.
AOL: who still uses it in 2026?
AOL Search is one of the oldest engines still in operation. Acquired by Verizon in 2015, then sold to Apollo in 2021 (alongside Yahoo) under the Yahoo! entity, AOL Search also uses the Bing engine on the back-end since the Microsoft partnership. Its current market share is marginal: less than 0.3% of desktop search in France in Q4 2025 according to StatCounter, and similarly insignificant figures in the US where it was historically stronger.
The AOL user profile is very specific: primarily North American audience, heavily skewed toward 55+, with residual use of AOL Mail and the aol.com portal as a homepage. For a French advertiser, AOL represents very little volume — often less than 1% of total Microsoft Ads, sometimes literally zero depending on geographic targeting.
The practical question: should you bother with it? For the vast majority of advertisers, no. AOL brings volume too low to deserve dedicated optimization. If your vertical specifically targets US 55+ (senior life insurance, cruises, health supplements), AOL can occasionally convert well and deserves to be left active without intervention. Otherwise, just check it doesn't drift in the 90-day Website URL report and move on.
Three practical cases where AOL still deserves a look. First case: advertiser targeting the French-speaking diaspora in the US (consular services, translation, French as a foreign language training for expats), where AOL concentration in the 55+ cohort can generate interesting micro-volume. Second case: premium tourism campaign targeting American seniors visiting France, where AOL can represent up to 4-6% of Microsoft Ads traffic on packaged-travel queries. Third case: testing a new mature demographic audience where AOL provides a comparative read — if ads convert on AOL, they'll likely convert on Bing 50+ as well.
Also worth noting: the syndication mechanic means that technically, you buy a single Microsoft inventory but AOL serving can fire without notice when the end user types their query from a device whose default engine remains AOL. You don't pay more, but you see this traffic appear in the Website URL report as aol.com or search.aol.com domains. No action required — it's simply the signature of active syndication. If you want the cleanest read on the partner benchmark, the Microsoft vs Google ROAS benchmark details the per-engine isolation methodology.
DuckDuckGo: the privacy-first newcomer
DuckDuckGo is the only one of the 4 engines to have gained market share between 2022 and 2025. Its France desktop search share went from 0.4% in early 2022 to about 1.2% in Q4 2025 according to StatCounter, driven by growing awareness of data privacy and native integration in some browsers (Brave, Firefox private profile, historically Ecosia).
DuckDuckGo's specificity is its total privacy promise: no persistent user profile, no DuckDuckGo-side tracking cookies, no data shared with Microsoft for targeting. Your ads display only based on the typed query and the user's IP geolocation. This has a direct consequence for you: audience targeting (remarketing, in-market, similar audiences, customer match) doesn't work on DuckDuckGo inventory. Only keyword targeting applies. See our Google Ads audiences guide to understand how audiences work when they're available.
The DuckDuckGo audience has a recognizable profile: tech-aware, younger than Yahoo/AOL (median 25-44), often in professional environments sensitized to data issues (devs, lawyers, marketers, HR, public sector). Dominant intent is mixed but slightly tilted toward practical and transactional search. Observed conversion rate is generally comparable to pure Bing, sometimes 5 to 15% below depending on vertical, but with comparable average order value.
DuckDuckGo captures an audience you can't reach anywhere else in paid search: privacy-aware users who have removed Google from their default engine list. It's a valuable complement, especially in B2B tech and SaaS, where the target overlaps with the DuckDuckGo profile. In the vast majority of cases, leaving it active on the Microsoft Ads network is neutral or even beneficial for overall conversion.
Impact on your campaigns: should you segment by engine?
The practical question for an advertiser: should you create separate campaigns per engine, or let Microsoft mix them? Short answer: leave it mixed, except in very specific cases. Long answer, in a few simple principles.
First principle: Microsoft doesn't natively offer single-engine targeting. You can't create a "Bing only" campaign by checking a box. The only way to favor an engine is to monitor the Website URL report and add under-performing domains as exclusions — which amounts to excluding rather than including.
Second principle: fragmentation kills volume. Microsoft Ads in France already runs on modest volumes compared to Google Ads. Splitting into 4 campaigns per engine dilutes conversions and prevents Smart Bidding from stabilizing. A single campaign with 80 conversions/month steers infinitely better than 4 campaigns with 20 conversions each.
Third principle: traffic quality is broadly consistent across sources. On the vast majority of accounts we track, the CPA gap between pure Bing and syndicated engines stays contained — often 10 to 25% against partners, sometimes neutral or positive on certain verticals. That's not a gap that justifies reorganizing an entire account.
Fourth principle: exclude rather than segment if you identify a problematic partner. If at 90 days you see a specific partner domain consuming 8% of budget for 0.5% of conversions, just add it as an exclusion at the campaign level. That's cleaner than a structure overhaul.
Fifth principle: monitor DuckDuckGo separately if you do remarketing. Since DuckDuckGo doesn't accept audience targeting, you may notice performance dilution on remarketing ad groups if DuckDuckGo captures too much volume. In this specific case, excluding DuckDuckGo from 100% remarketing campaigns can be justified — but leaving it on prospecting campaigns is fine.
To go further on the Microsoft audience network mechanics (which is yet another, distinct topic from the search network), see our article on the Microsoft Audience Network. And if you're just getting started, read our Microsoft Ads beginner guide 2026.
Common mistakes to avoid in multi-engine management
Multi-engine Microsoft Ads management concentrates five recurring mistakes that sabotage beginner or poorly calibrated accounts. A misread of the Website URL report or a too-hasty exclusion can amputate 10 to 25% of useful volume without the advertiser realizing. Here are the most frequent traps observed according to the public benchmarks referenced, each with diagnosis and corresponding fix.
1. Confusing Search Partners and Audience Network. Diagnosis: the advertiser excludes "all partners" thinking they're keeping only pure Bing, and loses 15 to 20% of actually useful search volume. Fix: the syndicated search network (Yahoo, AOL, DuckDuckGo) is not the Audience Network display. They are two distinct inventories. Disabling Audience Network is a separate decision that doesn't touch Bing/Yahoo/AOL/DuckDuckGo. Always check in Settings > Networks what each box corresponds to before checking anything.
2. Excluding DuckDuckGo too early on remarketing logic. Diagnosis: the Website URL report shows DuckDuckGo has a lower conversion rate than Bing on remarketing ad groups, the advertiser excludes the domain across the entire account. Consequence: they lose DuckDuckGo prospecting volume, which converts normally. Fix: exclude DuckDuckGo only on 100% remarketing campaigns, never at account level. Audience targeting doesn't work on DuckDuckGo, but keyword targeting remains valid and can be very productive.
3. Reading partner ROAS before 60 days. Diagnosis: at 30 days, the advertiser sees Yahoo at 0.8x Bing's ROAS and excludes it immediately. But 30 days on a partner receiving only 5 to 8% of Microsoft volume gives a sample of 50 to 200 conversions at best, statistically unstable. Fix: wait 60 to 90 days minimum before any partner exclusion decision, and require at least a 25% CPA gap to be significant. A partner that goes from 0.8x to 1.1x Bing's ROAS over 90 days is more frequent than people think.
4. Not checking Bing Merchant Center mapping when segmenting. Diagnosis: for Shopping accounts, excluding a partner domain without checking the impact on the Bing Merchant feed can break product-ad associations and tank Shopping Quality Score. Fix: before any exclusion, check in Bing Merchant Center that the product feed remains eligible across all partner sub-domains concerned. If Yahoo Shopping is syndicated, excluding yahoo.com can disable shopping ads from which you still get volume.
5. Over-segmenting by engine, thinking it improves control. Diagnosis: the advertiser duplicates their campaign into four versions (Bing-only, Yahoo-only, AOL-only, DuckDuckGo-only) trying to steer each engine independently. Result: no campaign hits the 30 conversions/month threshold needed for Smart Bidding, the account stays in permanent learning, CPA explodes. Fix: keep a single campaign with consolidated budget. Engine segmentation is never the right optimization unit — the right unit is search intent and keyword.
In summary: Bing remains the center of gravity, Yahoo and DuckDuckGo bring useful complement, AOL is anecdotal. In 9 cases out of 10, leave the network active by default, monitor the Website URL report at 60-90 days, and only exclude partners that genuinely drift. It's a medium-term management topic, not an initial setup topic. For a complete audit of your Microsoft traffic quality, you can launch a free SteerAds audit that includes the partner-engine breakdown and identification of under-performing sources.
For cross-cluster context on audiences and search intent types, see also our conversion tracking guide which transposes the essentials onto Microsoft Ads — see also Microsoft Advertising Research for more details.
Sources
Worldwide coverage: USA, United States, Europe, UK, EMEA, APAC, LATAM, GCC. Official sources consulted for this guide:
FAQ
Can I choose to advertise only on Bing and exclude Yahoo, AOL, DuckDuckGo?
Not exactly. Microsoft Ads doesn't offer a checkbox to exclude a specific partner engine: everything runs through the same owned + syndicated search network. You can however use the Website URL report at the ad group level to identify under-performing partner domains and add them as individual exclusions. In practice, in the vast majority of cases, mixing Bing with its partners is neutral or even beneficial: traffic quality is consistent and each engine's share is heavily dominated by Bing in France (between 80 and 90% of volume depending on vertical on the accounts we track).
Are there CPC differences between Bing, Yahoo and DuckDuckGo?
Yes, slightly. Average CPC on pure Bing tends to be 8 to 18% higher than on syndicated engines (Yahoo, AOL, DuckDuckGo) because bidder competition is stronger. But conversion quality often offsets the gap: Yahoo or DuckDuckGo traffic has a slightly lower average conversion rate, so CPA ends up fairly close across sources. For most advertisers, segmenting by engine isn't a priority lever before exhausting optimizations on keywords, ads and bids.
Does DuckDuckGo really use Microsoft Ads for its ads?
Yes. DuckDuckGo has a long-standing advertising partnership with Microsoft: the sponsored ads you see on DuckDuckGo come from the Microsoft Ads network. The specificity is that DuckDuckGo doesn't share user data with Microsoft: no cookies, no persistent profile. Your ads display based on the typed query and that's it. Audience targeting (remarketing, in-market, demographic) therefore doesn't work on DuckDuckGo inventory — only keyword targeting applies.
Does AOL really still exist in 2026?
Yes, but it's residual. AOL Search is still operated and serves a primarily North American audience aged 55 and over, with a desktop search market share below 0.5% in France according to StatCounter. For the vast majority of French advertisers, AOL represents less than 2% of Microsoft Ads volume, sometimes literally zero. It's a niche channel that can occasionally convert well on senior products (life insurance, health, packaged travel), but isn't optimized for specifically — it comes as a bonus.
How can I see my impression breakdown by partner engine?
In Microsoft Advertising, go to the Website URL report (under Reports > Custom). You'll see impression and click detail by serving domain: bing.com, yahoo.com, duckduckgo.com, aol.com and all syndicated search partners. This report is invaluable for understanding where your budget really goes, and for excluding individual under-performing partners. In most French accounts, you'll see Bing capturing 80 to 90% of impressions, Yahoo 4 to 8%, DuckDuckGo 2 to 5%, AOL often less than 2%.