I have only just started to monoitor security via Google 1 so apologies if this has been asked before but this came up -

mudcat.org

Your info was in a data breach and found on the dark web on 3 Dec 2020
Monitoring profile info was found

Info that you put in your monitoring profile matched info found in this data breach.
Email

dpolshaw@******.com

dpolshaw@******.com

Other info was found that isn't in your monitoring profile

Other info was found on the dark web alongside the info in your monitoring profile. The full details are hidden in case this info isn't yours.
Password

b••••

B••••

Do I need to do anything but changethe password?