A reporting view is where you can access reports and analysis tools. You can set up multiple views on one property to segment your data. When a new view is created, you are segmenting your data. For example, you can create a view to filter out your internal traffic and another to include only activity from a specific website directory or subdomain. When you delete a view, it is permanently gone. When a view is copied, you can save all of that data in case the original view that you copied from gets deleted. When you add a filter to a view, the data you exclude will be unavailable.
Views allow you to look more closely at traffic to a specific subdomain, part of a site, and to limit a user’s access to a subset of data.