How much of my ad traffic is bots?

Typically 20-40% for native campaigns. Run mouse tracking — zero movement? Culprit.

What's the best free bot detection tool?

Start with ads-review or Google Safe Browsing. DIY IP scorer for quick wins.

Yes — IP + fingerprints hit 80%. Add behavior for 97% like his setup.

You're flushing cash down the drain if bots eat 40% of your ad spend. This guy's $15K nightmare birthed a brutal bot-killer that actually works.

DevTools Feed Apr 03, 2026 3 min read 16 views

Published by

Ship faster. Build smarter.

#ROAS optimization #ad fraud #bot detection #bot-traffic

Get the best Developer Tools stories of the week in your inbox — no noise, no spam.

Originally reported by dev.to