Monthly Zoho charges but I am not sure what they are for

Monthly Zoho charges but I am not sure what they are for

I am being charged $21 per month but I have no idea what for and don't ever recall authorizing these charges.
Can you tell me:
a) what they are for?
b) when I supposedly authorized them?  (guessing it was some opt out that I missed)?
c) how to cancel going forward

Thank you!

Slade Foster