Bing Ads is the former name for Microsoft Advertising, still commonly used to refer to ads on Bing.
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 client asks an agency to review its old Bing Ads account. The manager recognizes that the account now sits within Microsoft Advertising and checks the current campaigns, access, and billing instead of looking for a separate legacy advertising platform.