What is the heart button next to the add to cart button on product pages?

The heart symbol located to the right of the "add to cart" button is to add a product to your Wishlist. You can only see the heart button after clicking on a product's main picture from the initial page. When you click on the main picture the full product details on that item are shown, including any reviews for that product located down at the bottom, but also information such as if the product is in stock or out of stock and whether you can request back in stock notifications, the full description of the product, and the add to Wishlist heart. Once you click on the heart, that item is added to your Wishlist. You can view your Wishlist from your account page (which means you must be logged in to your Bbeauty Dolls account). You can get to your account by clicking on your account icon at the top of the page which will show a circle with your photo in it (unless you didn't add a photo). A single click will show your account menu with My Profile, My Addresses, etc. and you will see an option for My Wishlist. If you click on My Wishlist you will see all the products you have added to your Wishlist to purchase or view later. If you hover your mouse over any of the images you will see a small "X" appear in the upper right hand side of an image. Clicking the X will remove that product from your wishlist. To add a product you must click the heart from the product page.