Why does my HVAC ad campaign suddenly stop performing even though I didn't change anything?

Sudden performance drops in HVAC PPC are often caused by automated bots contaminating your conversion pixels. When bots simulate real browsing, they trigger your tracking pixels and train the ad algorithm to bid on similar bot traffic, starving your campaign of real customers. BotRefund detects these bots in real time by analyzing mouse movements and device hardware, and suppresses your pixels so only human signals reach Google and Meta. This stabilizes your campaign performance and prevents erratic ROAS swings.