The Google AdWords platform is made up of Search, Display, Remarketing & Shopping:
Search Advertising: Placing sponsored results to appear atop the Google listings for a chosen keyword, with each keyword priced differently.
Display Advertising: Text, still and/or moving image ads that appear on third-party sites such as industry blogs.
Remarketing: Targeted advertising at users who’ve already visited your site at some point.Google Shopping: Being displayed as an online seller when users search for an item