Once you enable it, the plugin adds a “Add to wishlist” button right inside all product detail pages of your shop.
All users, registered or not, can add products to their wishlis. About registered users, data will be saved in the database, whereas, for unregistered users, the plugin uses specific cookies.
By default behaviour, “Add to wishlist” button is shown right next to add to cart button. However, you can change its position from plugin settings dashboard in “Position” field.