How to enable 2 step verification (Gmail)?

Click on the below link and follow the mentioned steps to enable 2 step verification:
https://www.google.com/landing/2step/

Click on Get Started
Click on Get Started (Next Page)
Enter your official Email Address and Password
Enter your Mobile Number and select Text Message option and click Next (Please enter mobile number which is available and working)
Enter OTP/Code received on Entered Mobile Number
Click on TURN ON* at the end

Please don’t forget to click on TURN ON at the end.