1) Go to Google Search Console: https://search.google.com/search-console/welcome 

2) Enter your website link under the URL prefix and click the Continue button. It's best to follow the default format https://www.

3) Select the option "HTML Tag" from Other verification methods. Copy the meta tag by clicking the Copy button.

4) Go to your Site Manager. Then go to Configuration > Google Integrations > Google Search Console. Paste the meta tag you copied and save changes.

5) After saving the changes on your site manager, return to the Google Search Console and click the Verify button and then click the Done button