News
You can do this anywhere you can find information about the user.
Preview the profile
If you hover your mouse over a username, a small window opens with content from the user's profile.
At the bottom right you can see the symbol of a circle with a horizontal line
From User's profile control panel
Click on the user's profile. You will see several icons Click on the three dots to access the list of options and you will find the option “Block"
Click on "Block" and select from the options presented
System
Please note: Some users like System Admins, Community Managers and Moderators cannot be blocked.