Ad group settings must inherit settings from the campaign level.

The statement is False because ad group settings do not have to inherit settings from the campaign level. While many ad group settings can be set to default to the campaign level, advertisers have the flexibility to customize ad group settings independently of the campaign. For example, settings related to targeting, bidding strategies, and ad types can be adjusted specifically at the ad group level, allowing for more granular control and optimization of campaigns. This flexibility is especially useful when running different ad groups within the same campaign that target distinct audience segments, products, or services. Therefore, while ad groups may inherit campaign-level settings by default, these settings can be customized to better suit the specific needs of each ad group.