Recently i had started editing all my email contacts- reason? Thanks to the auto add feature of Gmail which
“My Contacts” is a place to import, store and view all the contact information that is important. One can easily move the contacts to whom they have sent mails into “My Contacts” list. One can also create groups for his contacts so that one can send particular mail to particular group. There’s also “Most Contacted” list which stores the contacts of the people with whom u have contacted most number of times.
Source: Google Operating System.