Personalise your Gmail with changing your profile picture to your picture or something represent your personality .

Step 1 : Visit
Step 2 :

  • Go to the Avatar or  G icon 
  • In the bigger version of Avatar Click into word Change 

as following picture

Step 3 : A window of Selection picture will show up as following

Step 4 : Drag photo from your Computer to the Select profile photo window
Step 5 : Press Set as Profile picture

Step 6 : and here the avatar has been change.