Why is Lightroom Mobile Carousel Documents Folder so Large?

Greetings!

While going through my phone in attempts to clear up some space (just general files cleaning and organizing), I discovered that the Adobe Lightroom Mobile app, specifically within the carouselDocuments directory, contains 13+ Gigs of DNG files.

What are they for? Personally, I would like to just delete them all, but I want to understand what Carousel is, and what the files are for.

Anybody out there know?

Also, here is the directory path, for anyone who is curious (I currently have the phone linked up to my computer for easier cleaning):

This PC\Pixel 2 XL\Internal shared storage\Android\data\com.adobe.lrmobile\files\carouselDocuments