Performance Max campaigns will completely replace Smart Shopping and Local campaigns, being designed to offer more dynamic advertisements. Product groups are used in Smart Shopping campaigns to display adverts in the Google Shopping feed
Google Shopping is a comparative shopping platform, which allows businesses to visually display their items to consumers.
This implies that if anyone searches for an item you offer, Google will display relevant shopping advertising for your items as well as those of your opponents. If the consumer presses the button on your ad, it will be sent directly to the product item’s page.