One of the main reasons for establishing a group type is the ability to control the default settings for a group. This serves two purposes:
First, it makes creating new groups easier. With default settings established, you won't have to set these up with every new group you create. For example, if the Small Groups default contact information should always be "email@example.com" and "888-283-3812" (the church office phone number) then you can set this up one time and forget about it.
Second, it allows greater control over group settings within that type. For example, if the Small Groups contact information changed, you could change it at the group type level instead of having to edit it for every single small group.
Setting inheritance is an important concept in Planning Center Groups. It means that all groups, by default, will inherit the settings defined in the group type; allowing for the two advantages mentioned above. When necessary, you can override these default settings for any single group.
For something like a sports team, group uniformity may be a higher value than customization. For example, the schedule and even the group's description might be the same for every team.
For a small group, less uniformity may be a good thing. They might have different schedules and they'll likely want a unique description to reflect their own group's personality.
Certain settings, like the group's name, their properties, and their group image are always group-specific and cannot be inherited.
Where to establish group defaults.
Navigate to the group types:
Find the group type you're interested in, and select the "Group Defaults" button: