This tab unifies all WooCommerce related settings. These are a bit more advanced and not directly relates to your previous age gate from Agy.
There are two checkboxes: one for the customer registration and one for the checkout of your WooCommerce shop. Activate the settings and the customers are forced to accept that they are old enough to buy your products.
This option saves the customer decision, if he’s old enough or not. It does not save the current age of the user. This will be added in a later release in 2020.