These are small files that your site stores on visitors computers to store information.
The data in cookies are sent by a website that you’ve visited to then store in your browser. They’re used for storing information and generating personalized browsing for you.
They can also be used to remember login credentials, tracking users on a site, and for advertisers to learn about a user’s browsing behaviors.
In light of the GDPR, we do recommend WordPress site owners conduct an audit to see just what cookies your site sets as you’ll need to have a page on your site explaining what you set and why to your visitors.