This is the call to action button where you make the buyer tend to add the product to the cart for the final purchase. For the marketing strategies, it is always suggested to keep this option enabled on the product/archive page or the single product page.
Open the Customizer in your dashboard – Dashboard -> Appearance -> Customise – and navigate to the WooCommerce section – Customizer -> WooCommerce -> Product Catalogue – and scroll down to the Shop Product Structure section. Enable “Add To Cart” by clicking the “eye” icon. You can also change the position by moving the “Add To Cart” section within this list. See below.
Note: Did you know you could change the Structure of the Shop Product by dragging and dropping the fields. Watch this video to help you understand –