In a group, you can view the same data in multiple ways. You can create different views from the group page by adding filters and choosing what columns you want to display.
Views can be used in multiple ways:
Sub-groups. For example in an Fundraising group, create specific views for Business Angels, VCs.
Batches. For example, in a Media group, tag the journalists you want to contact for a specific press release and create a view to only display them.
Tags. For example in an Experts group, create views to display contacts' specific areas of expertise: SaaS, Enterprise Software, Retail, Finance, etc.