Meta Tags are text elements that are not visible to your website's visitors but provide important information to search engine crawlers e.g. Google.
This information includes your:
Wix submits your Meta tag data directly to Google. All you need to do is update the information within the Site Optimization area accessible within your editor.
With the Wix HTML5 editor, it's possible to add meta tags to each page of your website. But first you need to update your site meta information.
Pages in which you won't set specific meta information to, will use the site meta information.