A Product market fit (PMF) survey measures the uniqueness of your service (as perceived by your users). A good result strongly correlates to your ability to gain traction (grow fast).
tips_and_updates SatisMeter Quick Tip Video
A PMF survey asks how disappointed would your users be if you stopped existing. Use PMF surveys at milestone moments of your service/product, to gauge whether you should focus primarily on finding your Product Market Fit or on growing.
The score is a percentage of all responses that picked “very disappointed” from the total amount of responses. If you have more than 40%, you reached a Product Market Fit and it will be easier for you to gain traction.