Microsoft Merchant Center is the Microsoft Advertising tool used to manage product feeds for shopping and product ads.
It matters because Microsoft Advertising can reach valuable search and professional audiences that are often overlooked. Clear measurement and audience structure help the channel complement Google Ads rather than simply duplicate it.
Example
A merchant uploads a product feed and finds that several items are disapproved because required information is missing. Microsoft Merchant Center provides the place to review those product issues before the advertiser expects the affected items to appear in campaigns.