To create a group, you should follow these steps:
Start by clicking on the Groups icon that is in the Browse: tool bar, below the header on all pages
Click on the Create New Group button that is in the right hand column. You will be brought the Create a new group page.
Enter a Group Name and make sure to Check Availability
Add the Group Description, Tags, Image if you choose to, make sure to select the Group Type and Features.
Click Create group and you are good to go