Google Ads and Google Ad Manager are two different products that serve different purposes.

Google Ads is a pay-per-click (PPC) advertising platform that allows businesses to create and run ads on Google and its advertising network. With Google Ads, businesses can create and target ads to specific audiences, and they only pay when someone clicks on their ad. Google Ads is primarily geared towards businesses that want to reach potential customers through search and display ads.

Google Ad Manager is a platform for managing and selling advertising inventory. It allows publishers (websites and apps) to manage and sell ad space to advertisers. Google Ad Manager offers a range of tools for managing and optimizing ad campaigns, including audience targeting, ad serving, and ad reporting. Google Ad Manager is primarily geared towards publishers who want to monetize their websites or apps by selling ad space.

In summary, Google Ads is a platform for businesses to advertise, while Google Ad Manager is a platform for publishers to manage and sell ad space. Both products are part of the Google Ads suite of products and can be used together to create and manage ad campaigns.