Website show Google Ads when we have no Google Ads linked to our website

probably your website is hacked.
The first thing to do is:

  1. if you still have access to your website and can log in, try to
    put it in maintenance mode (you can use any free plugin).
  2. change your password and delete any unknown user.
  3. if your hosting has a Malware Removal Service, use it to clean up
    your site.
  4. if not, then 5
  5. try to update your themes and plugins.
  6. re-install WordPress (I prefer manually using FTP)
  7. Re-install the plugins
  8. reinstall the theme
  9. Clean out your database
  10. use a security tool.

To make sure your website is hacked, you can use this tool: https://sitecheck.sucuri.net/

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