Form engagement
A form submission is one moment. Everything that happened before it, or instead of it, is form engagement. It answers a question a plain submission count cannot: how far did someone actually get before they gave up.
The four states
A tracked form moves through, at most: viewed (it scrolled into view), started (a field was focused for the first time), and then either submitted or abandoned. It never goes backward. A form that reaches started cannot fall back to viewed just because a duplicate event arrives out of order.
Per-field timing
For every field the visitor touches, Jellyhook records how long they spent actually focused on it, in the order they filled the fields in. If someone fills the email field, moves on, then comes back later to fix it, both visits to that field count toward its total. This is what the Field Timing chart on a lead's page is built from: which field took the longest, and in what order they were filled.
Leaving the page is not the same as abandoning the form
Switching tabs, or briefly visiting another page on the same site, does not mark a form abandoned. The visitor might come straight back and keep typing. A form only gets marked abandoned once the whole visit is actually over, not just the current page. When that happens, the abandoned time recorded is the real last moment they were doing something in the form, never the moment the system happened to notice they were gone.
A limitation worth knowing
This only sees fields a person actually focuses. A field filled by browser autofill without ever receiving a focus event, which happens in some browsers, will not show timing data, even though it was filled in.