Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
Mobile Track is a feature that lets us you use a phone's sensors (on certain phones only) to track your activity rather than using a fitbit device. There's a good guide to it here: https://help.fitbit.com/articles/en_US/Help_article/1875/
Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
Can't see an issue with deleting it but also can't see how that will make the versa any more accurate.
Your Fitbit tracker has priority over mobile track, which is designed to count steps when the tracker is unable to.
This is a function of the app and not the Versa.