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Neither platform is a universal winner on reach or results. Google Search ads and Microsoft Advertising both match ads to search activity, support audience signals, and report advertiser-defined conversions. Compare them using the networks and partner traffic actually enabled, the audiences available to your account, and aligned conversion and attribution settings—not a headline audience-size claim.
How do reach and search-partner traffic differ?
Google’s Search Network can include Google search properties and search-partner placements. Search partners are included by default in Search campaigns, and advertisers can turn them off. Google Ads Help also says standard Search Network reporting does not identify the specific partner website where an ad appeared.
Microsoft describes search partners as a way to extend Search ads beyond Bing and recommends reviewing partner traffic for clicks, conversions, and return on ad spend (ROAS). That is Microsoft’s product guidance, not an independent measurement of incremental reach or partner quality.
| Comparison | Google Search ads | Microsoft Advertising Search ads |
|---|---|---|
| Search inventory | Google search properties and, if enabled, search-partner placements. Google’s documentation does not provide a comparable total audience figure. | Microsoft’s advertising network, including search-partner placements. Microsoft’s product page does not provide a comparable total audience figure. |
| Partner controls and reporting | Search partners are included by default in Search campaigns and can be disabled. Standard Search Network reporting does not identify the specific partner website for an impression (Google Ads Help, “About the Google Search Network”). | Microsoft says search partners can extend reach beyond Bing and recommends monitoring partner clicks, conversions, and ROAS (Microsoft Advertising, “Microsoft Search ads”). Check which partner reporting views are available to your account. |
| Current head-to-head reach figure | Not stated in the cited Google documentation. | Not stated in the cited Microsoft documentation. |
These descriptions are not a common measurement of reach: network definitions, partner mixes, markets, and available controls are not necessarily equivalent. For a useful comparison, record which networks are included in each campaign and separate partner traffic where the platform’s settings or reports allow. If one platform cannot isolate an inventory component, label the aggregate accordingly rather than treating it as like-for-like.
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What audience targeting can you use?
Both platforms let advertisers combine search activity with audience information. Audience settings can refine who sees or is prioritized for an ad; they do not, by themselves, make a keyword-led Search campaign a different inventory type.
- Google: Google Ads Help documents using website visitor data segments in Search campaigns at the campaign or ad-group level for targeting or bidding. Its guidance says Smart Bidding can consider audience-segment factors.
- Microsoft: Microsoft describes audience targeting for Search ads. Its UET documentation covers remarketing and lists audience types including remarketing lists, customer lists, in-market audiences, custom audiences, and combined lists.
Available segments, eligibility rules, minimum audience sizes, and controls can vary by market, account, and campaign type. Confirm what is available in the relevant account before treating the platforms’ audience menus as equivalent.
Microsoft Advertising’s audience-targeting page states that “Using any type of audience targeting results in a 50% higher conversion rate on average.” This is Microsoft’s own stated average, not an independent Google-versus-Microsoft comparison. The reviewed page did not expose the full methodology, so the figure does not establish a sample, geography, period, or causal effect.
How do conversion tracking and attribution compare?
A platform’s conversion total reflects both advertising and measurement choices. Define the business event first—such as a completed purchase, qualified lead, sign-up, or call—and align how value is assigned before comparing results.
- Google: Advertisers choose which actions count as conversions. Google documents tag-based measurement for many actions and certain tagless paths for some calls, app, and local actions. For Smart Bidding, Google distinguishes primary actions used for bidding from secondary actions kept for observation.
- Microsoft: Universal Event Tracking (UET) records page visits and custom events; advertisers use the recorded activity to define conversion goals. Microsoft describes UET as the foundation for paid-search conversion tracking and remarketing. Its Conversions API offers a server-side route for website, CRM, offline, and mobile events. Microsoft recommends using the API with UET when possible and planning deduplication if both send the same conversion.
The Conversions API is an implementation option for advertisers with suitable data and technical capacity, not a requirement for every basic Search campaign. On either platform, check the event definition, value logic, attribution settings, consent handling, tag or event implementation, and duplicate-event treatment. Differences in those settings can produce different reported conversion counts even when media performance is similar.
Which metrics should you compare?
Google lists Search campaign metrics including clicks, click-through rate (CTR), conversions, conversion value, ROAS, cost per conversion, and average cost per click (CPC). Microsoft’s reporting documentation describes reports at multiple levels, including keyword and account level; its Search ads guidance specifically recommends examining partner clicks, conversions, and ROAS.
Use detail to diagnose campaign changes and rollups to make budget decisions. Keep the reporting period, campaign objective, geography, devices, query intent, included networks, conversion event, and attribution settings as consistent as possible.
- Delivery and traffic: impressions, clicks, CTR, and CPC.
- Business outcomes: qualified conversions, conversion value, cost per conversion, and ROAS.
- Search diagnostics: keyword and search-term performance where the account’s reporting supports it.
- Partner contribution: partner clicks, conversions, and ROAS where the platform exposes those figures.
Do not treat a conversion count as self-explanatory: an advertiser-defined conversion may represent a low-value action or a valuable business result. Compare the event and its value rules, not just the total.
How can you make a fair platform comparison?
- Choose a matched basis. Use comparable historical campaigns or run matched campaigns by region, dates, devices, objective, and query intent.
- Set network scope. Record whether partner traffic is included on each platform. Where settings permit, compare core search and partner traffic separately.
- Align measurement. Define the same primary business event and value logic, verify tags and consent handling, and align attribution settings as far as each platform allows.
- Review both traffic and outcomes. Assess delivery metrics alongside qualified conversions, conversion value, cost per conversion, and ROAS.
- Document what cannot be isolated. If a platform’s reporting does not break out a network component or placement at the needed level, disclose that limit instead of presenting totals as directly comparable.
Microsoft says advertisers can import campaigns from Google Ads. Treat an import as a starting point: review network settings, targeting, tracking, bidding, and other configuration differences rather than assuming the imported campaign behaves identically.
Is either platform proven to perform better?
The official product and help materials described here explain each platform’s controls and stated capabilities, but they do not establish a current, neutral, apples-to-apples winner for reach or performance across equivalent markets, devices, settings, and conversion definitions. The practical answer depends on the advertiser’s market and matched account data; avoid using platform-level feature descriptions or Microsoft’s audience claim as proof that one service outperforms the other.
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