Google site verification

To verify your ownership of the site in Google Webmaster tools:
1) sign in here - https://support.google.com/webmasters/answer/9008080?hl=en
2) add a site
3) in the "verify your ownership" page, choose the "Alternate methods" tab
4) you will find there a code like this:

<meta name="google-site-verification" content="your_code_here" />

5) copy and paste this code in your Berta website "settings - Other settings" tab in the field "Google site verification tag".