YITH WooCommerce Popup (Premium Plugin):
All people active on the web know the advantages of using popup windows. A popup window dramatically increases the visibility of what you put in it. The conversion rates of users who see it and allows you to get instant feedback from your users. Use them in a non-intrusive way and they will turn out to be one of the most powerful marketing strategies to increase sales in your store.
Customize your popup windows using templates carefully designed by YIThemes for YITH WooCommerce Popup. You can make them become part of your site and of your sales strategies. You can also put whatever you want in them that has to be shown quickly to your users.
Put there a contact form, a newsletter form, suggestions, and even products. Choose the page and the position where showing your popup and, which is even more interesting. You can also make this plugin interact with the WooCommerce plugin. You can show in the popup window a specific product, a random one, one from a category and so on.
Make your offers in a quick opening window instead of forcing your users to load a new page.