For a plumber, electrician, roofer, or HVAC company, the money moment is almost never a web form — it is the phone ringing. Yet a huge number of local Google Ads accounts only track form submissions as conversions. That means Google is optimizing your campaign toward the minority of leads and ignoring the phone calls that actually pay the bills.
The consequence is subtle but expensive. Google's automated bidding learns from your conversion data. If the only conversions it sees are form fills, it will steer spend toward the keywords and ads that produce forms — even if a different set of keywords quietly drives twice as many phone calls. You end up optimizing away from your best traffic without realizing it. Call tracking fixes this by making phone calls visible as conversions.