Before proceeding with the steps, make sure to download the latest version of Google Chrome and a Google Account (work or personal).
How to mention a person in Google Docs
Open Google Docs on Chrome and login using Google Account
Now, create a new document or open an existing one
The type ‘@’ symbol anywhere in the document.
This will open a drop-down menu showing recent contacts. You can simply start typing the name after the @ symbol and select the contact from the drop-down menu.
How to share the document using Mention feature
Although, sharing a Docs file is not at all a tricky task, mentioning someone in the documents automatically opens up a dialogue box seeking permission to share the document with the mentioned person.