To create a group in Microsoft Teams, start by signing in at portal.office.com and opening Teams. Click on Teams in the left panel, then select Join or create a team. Choose Create team, then pick a team type (such as Class, Staff, or Other). You can create a team from scratch or from an existing Microsoft 365 group. Name your team, add a description, and set privacy preferences (Private or Public). Click Create, then add members manually or invite them via a link. Your group is now ready for collaboration, file sharing, and communication in Microsoft Teams.