How are Shopping ads created?

• Keywords in Google Ads help Google’s system determine which ad will show for a user’s search query.
• The product information in Merchant Center and the bid set in Google Ads helps Google’s system determine which ad will show for a user’s search query.
• Keywords in Google Ads and the bid set in Merchant Center helps Google’s system determine which ad will show for a user’s search query.
• The campaign and bid settings in Merchant Center helps Google’s system determine which ad will show for a user’s search query.
OR
• Google’s system determines which ad appears in response to a user’s search query based on keywords in Google Ads.
• Google’s system determines which ad appears in response to a user’s search query based on product information in Merchant Center and the bid set in Google Ads.
• Google’s system determines which ad appears in response to a user’s search query based on the campaign and bid settings in Merchant Center.
• Google’s system determines which ad appears in response to a user’s search query based on keywords in Google Ads and the bid set in Merchant Center.
OR

• When a user enters a query, Google’s system determines which ad appears based on the campaign and bid settings in Merchant Center.
• When a user enters a query, Google’s system determines which ad appears according to the product information in Merchant Center and the bid set in Google Ads.
• When a user enters a query, Google’s system determines which ad appears according to keywords in Google ads and the bid set in the Merchant Center.
• When a user enters a query, Google’s system determines which ad appears according to keywords in Google Ads.