what are .webp files and why has my online experience been plagued by them?

I don't know what a .webp file is but I don't like it. They're like a filthy prank version of the image/gif you're looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.

Edit: honestly I assumed it had something to do with Google protecting themselves from image piracy shit