The primary reason why Gmail requires your phone number is that it can protect your privacy. With the phone number, Gmail can verify your as to who you are. Once it connects the account with a person who is real, the account is difficult to break in because any time someone tries to access your account, Google will alert the user that is you and resend another verification code.

In case you are wondering How do I bypass Gmail phone verification, then the following steps shall make it simple for you to comprehend-

Try to get an interim phone number that can receive texts. When you sign up for a new Gmail account, you will need to verify a confirmation code that can only be received via SMS or over a  voice  call. In spite of that if you don't have your own phone number, here are a few ways you can use one non-permanently-

-If you already have a separate Gmail account and reside in the United States, you can create a Google Voice phone number at no extra cost.

-Depending on the region in which you are putting up, you may be able to sign up for a disposable phone number.

-You can use someone else's phone like your family member’s or a friend’s phone number during the verification process. 

-The gmail live person shall then guide you  with the phone’s process.

             If the above option seems impossible, you can email or chat with a friend online and ask that they are willing to receive your confirmation code and provide it to you for verification.