If you or your team have already created additional views for your Google Analytics property (or properties), congratulations. You’re already doing at least one thing the way you’re supposed to.
Why is it considered best-practice to have multiple views per property? For one thing, you should be filtering out your internal traffic and your development server activity, and there are also a range of other view settings and filter that can help you to clean, consolidate, and segment your view data.
However, you should not apply any settings or filters to your single All Web Site Data view. At a minimum, you should create a test view and a backup view.
As a note, the previous name for view was profile. In Google Analytics, the terms are synonymous. View is a more descriptive name, since the purpose of a view is to provide a particular view on your raw Website or app data.
You can create up to 50 views per standard Google Analytics account, but you do need Edit access at the property or account level.
Still have only that one view? Create test and backup views today, and try out a filter or setting in your test view. In any case, don’t be afraid to create additional views: backup and test to begin with, and whenever you need a more specialized representation of your data.