If you have more than one microsoft account (for example) then you need multiple chrome profiles to be able to access them both at once.
You can open a new profile, "pin" it to your task bar, and treat it as a whole separate persona.
If you inspect that profile shortcut's "properties", you'll find the Target is something like this:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --profile-directory="Profile 3"
The important bit there is "Profile 3"
After a while though, your "original" chrome icon might assume you want to use one of the other profiles.
So change your original chrome shortcut to have this Target:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --profile-directory="Default"
And if you want to link to any other profiles: after this, they are named like this:
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --profile-directory="Profile 1"
or this
"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --profile-directory="Profile 3"
You can find the names of the profiles with this query:
dir $env:LOCALAPPDATA"\Google\Chrome\User Data" cookies -rec |
% PSParentPath |
% { $_.split('\\')[-1] }