something done after, to continue or check on a thing
अनुवर्ती कार्य
Usage
The doctor asked me to come back for a follow-up next week.
The company's new app is a follow-up to its first hit.
Common mistake
I will follow-up with the bank tomorrow.
I will follow up with the bank tomorrow.
The verb is two words; follow-up is the noun.
Remember: Hyphen for the thing, a space for the action.