If your org is old you may need to enable it manually, if you have a new org it should already be on. I highly recommend turning it on and off so you can see the difference. Some developers prefer the old interface for a variety of reasons, while Admins and support may prefer the enhanced view due to some of the great features like search, grouping of profile features and the easy on the eyes UI.
Something that I get asked a lot is well which profiles can do something, for example, which profiles can create contacts. The though of having to manually look at the all or pull down the export doesn’t sound great. You can do this while staying in the UI by creating a Profile list view and selecting the columns to display in the list view creation you will have three options.
Now, I want to see all profile that have Contact Create Access so we will select object permissions and scroll until we find ”Contact: Create”. Make sure you use the arrows to select it and hit save.
Now we will be able to see all the Profiles that do an dont have Create contact ability.
Some notes!