This Gmail hack has been around for a LONG time and most people already know about it. This trick usually works the best when signing up on forums or anywhere online because most forms will accept periods as an allowable symbol of a typical email address.
So for example, I could write out my email address as of the normal can add as many dots as you like in any location and the email will still come to you. If you didn’t already know, Gmail does not consider any extra dots in your account name when processing email.