Magento 2 Age Verification extension helps e-commerce store owners to enable a step about how much the age of this customer is, before enabling the permission to view or to buy on specific store pages.
Age verification is important if there are businesses, especially related to one that falls under a category like 18+ only, lottery, gambling, or banking. You'll need an extension to verify the minimum age that customers must be in order to see or make purchases on various store pages.
Then the MagentoBrain addon for Magento 2 Age Verification Popup is the solution for this kind of problem during purchases. You may use this extension for ensuring the customers' age on your business website.