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Polaris offers a full integration of WooCommerce Wishlist plugin*. The wishlist is one of the most useful feature of an e-commerce: on one side, it encourages users to come back, allowing products tracking they consider interesting until the purchase step. On the other, if users share their wishlist — to friends, or through social networks — this will enhance the sales and will help the promotion of you online business. You can read more about about the plugin here.
* The theme is bundled with the free version of plugin.