Meta tags are used to list the title and description of a site for SEO purposes for better search engine visibility. 

Please follow this doc to set the Meta tag for your Pages.

1:  Go to your site pages: Let's take example of Home Page. Site > Pages> Home Page. And click on the Edit icon.

2: You will get redirected to the page editor. Click on the drop-down icon on the top right of your editor page. You find an option Page settings, click on this link.
​

3: Enter your Page Title, Page Meta Description & Page Meta Keywords(comma separated) in the corresponding fields. 

4: Here is an example to show you how the title tag will be listed on search engines, for  online school MyMusicTheory.
​