Microsoft Advertising (formerly Bing Ads) is Microsoft's paid search platform serving ads on Bing, Yahoo, and DuckDuckGo search engines. In the UK, Bing holds approximately 6-8% of search market share — smaller than Google's 90%+ but commercially meaningful, particularly for B2B, financial services, and older demographic audiences. Microsoft Advertising typically offers lower CPCs than equivalent Google Ads campaigns (often 25-50% lower) and is increasingly integrated with Microsoft's AI products including Copilot, making it relevant for AEO as well as traditional paid search.
Microsoft Advertising is the most underutilised paid search channel for most UK businesses. Its lower market share creates lower competition, which translates to lower CPCs for equivalent audience reach. For businesses that have maximised Google Ads efficiency, Microsoft Advertising offers incremental reach at lower cost — particularly for B2B audiences using Microsoft Edge and corporate devices where Bing is the default search engine.
When Microsoft Advertising makes sense for UK businesses
- B2B businesses — corporate Windows users with Bing as default search engine are an underserved audience
- Financial services and insurance — Bing's older demographic skews toward higher-income audiences
- Legal and professional services — higher-value B2B queries with lower CPCs than Google
- Businesses that have maximised Google Ads — incremental reach at lower marginal CPC
- Testing ground for ad copy — lower CPCs make testing cheaper; winning variants can be applied to Google
- Competitors with low Microsoft Advertising presence — less competition lowers CPCs further
Microsoft Advertising is structurally very similar to Google Ads — campaigns, ad groups, keywords, and ads work on the same principles. Google Ads campaigns can be imported directly into Microsoft Advertising with minor adjustments, significantly reducing setup time. Differences include: Microsoft's Universal Event Tracking tag for conversion tracking (vs Google's tag), slightly different audience targeting options, Microsoft Advertising's LinkedIn Profile targeting (unique B2B targeting using LinkedIn data), and integration with Microsoft's AI products that is distinct from Google's AI ecosystem.
Microsoft's investment in OpenAI and the integration of GPT-4 into Bing and Microsoft Copilot makes Microsoft Advertising increasingly relevant for AI-era search strategy. Ads served alongside Bing AI Copilot responses are a new and growing format. Structured data and content optimised for Microsoft's AI retrieval systems may yield different citation patterns than Google AI Overviews. For comprehensive AI search visibility, a presence in Bing's advertising ecosystem alongside Google's is worth considering for businesses where the incremental reach justifies the investment.