If you want to block someone on Facebook, then follow these steps:
>> Sign in to your Facebook account.
>> You will find a gear icon on the upper right corner of your home page. Click on that icon.
>> Choose the option “Settings”.
>> On the left side, you will see an option “Blocking”. Click on that option.
>> After then, in “block users” tab, type the name of a person whom you want to block.
>> Click on the option “block”.