Creating “groups” in Gmail

Question

How do I make a group contact in Gmail?

I want to email everyone in the office and have an "office" group that will email all the people in this group.

Answer 1

1. Contacts
2. Click the New Group button: "+" with 2 people.
3. Give it a name and click ok.
4. Go back to My Contacts (or whichever grouping is appropriate) and select users.
5. On the right, click Groups and select the group to add to.
6. Compose an email and use the group name in the To field

Answer 2

In Google Contacts, create a group then add people to this group. When you compose your email, this group will expand to individual email addresses.