Every Gmail user has two email addresses.
For example: if you have a Gmail id:xyz@gmail.com, the second one isxyz@googlemail.com.
This will be useful for opening multiple accounts in a website or app.
For example, In Redbus mobile app, if you are new user (i.e., if you use new email id) you will get flat 100 rupees off on ticket booking. If you have already usedxyz@gmail.com you can still usexyz@googlemail.com and take advantage of the offer. You will receive your ticket to your normal inbox itself. Thank me for saving your time from creating a new email account.
Ref: All Gmail Users Have Two Email Addresses
The dots in the Gmail id doesn't matter.
Lets say your gmail id issomeone.initial@gmail.com, then if somebody is sending email id toso.meoneinitial@gmail.com orsomeoneiniti.al@gmail.com then the email will be delivered tosomeone.initial@gmail.com inbox itself.
