Download the file and extract its contents. Locate LUTs Folder:
If a LUT is too aggressive, adjust the "Intensity" slider in the Lumetri Color panel to blend it better.
How to to a specific camera (Sony, Canon, Blackmagic)? FREE CinePack LUTS Sample Pack
Apply LUTs to an adjustment layer above your footage in Premiere Pro, rather than directly to the clip. This makes it easier to toggle the effect on/off.
The pack often includes roughly 15-30 different creative looks. These are designed to alter the mood of a scene (e.g., moody teal and orange, vintage film, high contrast).