1. Log into your account
  2. Navigate to the Groups section
  3. Find the group you want to add people to
  4. Expand the actions options
  5. Select the Show group details option
  6. Press the Add People button
    1. Optional: Select the people you want to add to the group
    2. Optional: press the Add Selected button to add the selected people
  7. Press the Add All button to add all people to the chosen group