To learn more about what data are store on your website when you install YITH Wishlist plugin, please, refer to the text that you can find when creating/editing your Privacy Policy page. Go to WordPress > Settings > Privacy and create a new page or edit an existing one.
Then, click on the View Privacy Policy Guide link where you can find all informative texts by all the plugins you’ve installed.
You will be able to copy the text you’re interested in and save it in your Privacy policy page.
This is specifically the one printed by YITH Wishlist plugin:
Please, consider that the above sample text includes the basics around what personal data your store may be collecting, storing and sharing, as well as who may have access to that data. Depending on what settings are enabled and which additional plugins are used, the specific information shared by your store will vary. We recommend consulting with a lawyer when deciding what information to disclose on your privacy policy.