It's not unusual for a software company like Adobe to continually add features and modify preexisting ones to programs with which we are already familiar. One of these features which recently got an upgrade, Profiles, is a tool created to add new looks and styles to your shots which can't be achieved by using the standard sliders or controls in the program.
This little feature has spent its time, up until now, at the bottom of Lightroom. But just recently Adobe put it up at the top of the develop panel and gave it a solid upgrade. Profiles uses lookup tables (LUTs) to give the image the specific look and style that you see. Right now you can't create your own LUTs in Lightroom, unfortunately, but if you are feeling particularly ambitious then there are other third-party software options, like 3D LUT Creator, that allow you to create LUTs which can then be brought into Lightroom. I wouldn't be surprised to see other companies and individuals creating their own LUTs in the near future to sell as digital products, similar to current markets for Lightroom presets.
Here are a couple examples of Profiles being put to use.
Right now Profiles are available both Lightroom Classic CC and Lightroom CC. There are 18 Adobe standard profiles, broken down into 7 Adobe Raw profiles, 5 Camera Matching profiles, and 6 Legacy profiles. There are also 45 stylized profiles built into the programs; 8 Artistic profiles, 17 Black and White profiles, 10 Modern profiles, and 10 Vintage profiles. You can only use one profile and there isn't an option to apply multiple profiles at the same time.
Now you can add some of these custom looks and styles to your images with relative ease without having to resort to an external plugin. For those of you who already use Profiles, make sure to add shots where you've used Profiles to your portfolio and share the link down below in the comments (also, shots added to your portfolio have the chance to become an Fstoppers Photo of the Day).