Click fraud software should be a reactive solution and for the record I can’t confirm if it actually works.

What I mean by this is if you find that other traffic sources (organic, social or other CPC ads) are performing considerably better than Google Ads, you may want to check your analytics for users from Google Ads to see if they have a high bounce rate or excessive users who don’t spend much time on site.

If this all lines up than you probably want to give click fraud software a try.

Hope that helps.