You can use campaign priority to:

You can use campaign priority to:

A)Have Google prefer certain inventory in query matching and ad serving
B)Tell Google which campaign’s bid to use for a product when the same product is included in multiple campaigns
C)Speed up how fast a campaign’s budget is spent throughout the day
D)Make your Product Listing Ads more competitive in the auction

Answer is – Tell Google which campaign’s bid to use for a product when the same product is included in multiple campaigns