It is common for clients who are worried that their ads may get served on fraudulent websites and spammed click by bots. This is highly unlikely nowadays. As Google machine learning algorithms get better, the ads are optimized for conversion performance. The algorithm increasingly understands that it needs to get maximum conversions for your business and will avoid placements with no conversions. That includes fraudulent and shady websites that generate no results. After all, clients are using Google Ads for one purpose only; to drive results.
On top of the automatic enhancements by Google, we also do manual review of the placements of your ads to actively exclude any websites that have not brought conversions for a long time. We will advise clients who are really concerned about bots to get click fraud protection software to protect their PPC spend.