Paid ads attribution
the form-fill gap: why most of your paid traffic never converts
The short answer
The form-fill gap is the distance between everyone who visits your site and the small share who fill in a form. In B2B that gap is wide, and almost all of your attribution is built on the filled-in slice. Closing it means identifying the anonymous visitors, so your reporting reflects real demand rather than just the people who raised their hand.
Forms capture very little, for a reason
Serious B2B buyers do their research before they want to talk. They read your pricing, compare you, and leave, often several times, before anyone is ready to fill in a form. Plenty buy without ever filling in one at all.
So when your attribution counts only form fills, it is counting the end of a journey and ignoring the whole middle. The campaigns that did the early work look weak, and the few late-stage forms get all the credit.
Closing the gap means seeing the companies behind the anonymous visits. You do not need everyone to fill in a form. You need to know which businesses were there and what they read, which is the heart of the dark funnel problem.
The honest catch
You will never close the gap completely, and some buyers stay invisible. But narrowing it changes your reporting from "who filled in a form" to "who actually showed up", which is a far better basis for deciding where your budget goes. See how it fits paid attribution in the full guide.
Frequently asked questions
The difference between everyone who visits your site and the small share who fill in a form. Most B2B attribution is built on that small share.
See the companies behind the anonymous majority of your paid traffic, not just the few who fill in a form.
Read the attribution guide