A mailing list is a group of your Google Contacts organized into a convenient list so you can send an email to them in one go.
Step 1: Open list screen
Select *Lists* from your Gmail Inbox:
Step 2: Create new list
Click the *New List* button. If you already have a list created and you just want to add some more contacts, then skip to the next step.
Step 3: Add contacts
Add people to your mailing list by first clicking the red Add Contacts button. Then from the pop-up dialog put check marks against the people you want added to the list. Click the blue Add button.
Then from the pop-up dialog put check marks against the people you want added to the list. Click the blue Add button.
Step 4: Remove Contacts
To remove contacts from a mailing list. Open the list and add check marks next to the people you want removed. Then click "Remove Contacts"