How to remove "Grav is an easy to use, yet powerful, open source flat-file CMS." from Google Search

How do I change the text that says Grav is an easy to use, yet powerful, open source flat-file CMS. I found it in my desctiption on google search

Find where the text is coming from, which you could have easily done by searching Grav's user folder for that text. From memory, there are two places it might be:

• Grav's user/config/site.yaml may have a metadata property which will be used as the default on any page where it's not overridden;
• a metadata property in the page's markdown file. Create and populate this to override site-wide defaults set in site.yaml.

Grav Learn has lots of information if you search for 'metadata'. In particular, look at Meta Page Headers.