Also: run experiments to find an "optimal" budget with the right size for your target audience. If you, e.g., set a too restrictive geographic rule, but also set a budget higher than what they manage to burn showing your ads at the area you defined, they will override the rules you set up to guarantee 100% of your money will be burnt.

> only enable Google Search ads

Except then they just don't run your ads unless you're willing to pay silly amounts like $3 per click for bot traffic.