Close rate is the share of quotes that turn into jobs. Twenty quotes, six jobs, a thirty percent close rate.
Raising it is winning more of the work you quote.
Purpose
It separates two problems that feel identical from the inside. Revenue is down, and the cause is either not enough people asking, or not enough of them saying yes. More marketing fixes the first and makes the second worse — you spend more to generate quotes you were already losing.
A low close rate with plenty of quotes is a pricing, speed, or trust problem, and none of those are solved by buying more leads.
What moves it
Speed. Being first to respond wins a surprising share of jobs on its own.
Price, but not the way people assume. Losing on price at a high rate can mean you are too expensive for the market you are advertising to, rather than too expensive in general. Changing who sees the quote is often cheaper than lowering it.
Follow-up. A meaningful share of quotes are lost to silence rather than to a competitor.
Interpretation
Close rate on its own can mislead. Winning ninety percent of quotes usually means you are underpricing — markup and margin is worth checking before celebrating a high number.
Read from your field service system's own records rather than a pipeline somebody maintains, the same figure is quote conversion.
Raising the rate is its own subject, and price is only one of the four things that move it — see improving close rate.
Close rate counts what you won. What you were explicitly told no about — as distinct from quotes that simply expired — is the estimate decline rate, and the two failures have opposite fixes.