Create

  1. New Message → New Group and pick initial members;
  2. Set a name and photo, optionally make it public with a custom link;
  3. Configure permissions and admins under Manage Group.

Public vs private

  • Public groups are searchable with a short link — good for communities;
  • Private groups are invite-only — good for internal teams.

Management

  • Upgrading to a supergroup raises the limit to 200,000 members;
  • Give admins specific rights rather than full power;
  • Slow mode prevents flooding.