A group of team can be created for a project or other activities. This group can be created by those who have the rights to create  group. Ideally they could be admin or Manager. In order to create, go to Manage > Teams > Manage Groups. Here you will see list of groups which are already created, unless none. Now click on '+' icon to create a new group (highlighted in purple)

A popup will appear where you need to do the following:

1. Group Name: Add a name of the group you want to be associated with, for example 'Sales & Marketing'
2. Group Members: Add Names of the employee associated with this group
3. Administrator(s): Can be more than one, Here we have selected 'John Smith'

Click on 'Confirm' button to create this group. The row highlighted in purple shows the newly created group of 5 members for Sales & Marketing