WebP is Google’s version of a modern, versatile image format, meant to replace the likes of PNG and JPEG. However, all it’s managed to do in the last several years is be a mild annoyance. It’s great when websites use it to display images — the format handles compression well — but it’s a hassle…
By default, your Samsung Galaxy smartphone saves screenshots as crappier .JPEG images. Nothing against the good ol’ JPEG, especially if you need to save as much space on your device as possible. They just don’t look as good as the alternative that (almost) every other Android device uses as a default—the mighty, lossless .PNG.