To create a distribution list (also called a contact group) in Outlook, follow these general steps:

1. Open Outlook and go to the People or Contacts section (usually found via the people icon in the folder pane or bottom left corner).
2. Click on "New Contact Group" or "New Contact List" in the toolbar.
3. Name your group with something meaningful.
4. Add members to the group by selecting contacts from your Outlook address book or entering email addresses manually.
5. Save the contact group.
6. To use it, simply type the group name in the "To" field when composing an email, and it will send to all members.

The process is quite similar across Outlook desktop (Windows or Mac) and Outlook on the web, with some minor UI differences. On Windows, you might find "New Contact Group" under "New Items" > "More Items" > "Contact Group." On the web, you create the list under the People icon and then "New contact list." This group lets you email multiple people easily without entering every address individually each time.