Microsoft Ads Attribution

Microsoft Ads Data-Driven Attribution Landed in April 2026 — After Google

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Microsoft Advertising shipped data-driven attribution in the April 2026 wave, replacing last-click as the default conversion model three years after Google made the same move. Smart Bidding now optimises against fractional credit distributed across the full customer journey — but only sees the touchpoints your tracking actually sends. WooCommerce stores relying on browser-only UET will feed the model an incomplete picture.

Microsoft AI Max for Search Opens in May (Not Google’s)

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Microsoft Advertising opens AI Max for Search to a public pilot in May 2026 (MediaPost, 2026). Despite the identical name, this is a different product from Google’s AI Max — Microsoft’s version expands query matching across Copilot and Bing, ships a new Offer Highlights ad format inside AI conversations, and gives advertisers two guardrails: term exclusions first, messaging constraints later. Search-term reporting becomes a default column in May. WooCommerce stores have four weeks to audit their feed for Offer Highlights eligibility and instrument server-side capture so AI surface is decodable when reports go live.

Microsoft Ads’ PMax Import Just Flattened Your Customer History

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Microsoft Advertising rolled out Google Ads Performance Max import for New Customer Acquisition goals to all advertisers in the third week of April 2026. The import maps Google’s auto-generated “all converters” list — which contains every user who placed at least one order — to a Microsoft remarketing list used as the NCA saturation definition. For WooCommerce stores where 30–60% of the customer base is dormant one-time buyers, this treats those customers as saturated and locks them out of net-new bidding. The fix: send Microsoft a richer customer signal via UET CAPI carrying first_order_flag, recency, and lifetime orders from the WooCommerce hook layer.