Product Shopping ads
These ads are created based on product data.an image, title, price, and your store or business name inside your ads can be added. There is usually no need to create individual product ad.
Showcase Shopping ads
Show case shopping ads are created grouping related products to enable individuals compare and click on the right one. The more ads created the more the possibility of your ads appearing on a search.
Local inventory ads
These ads help to drive traffic to your local stores. On google Display network, data provided from local inventory ads is used to engage users.