JPEG vs PNG vs GIF — which image format to use and when?
There are hundreds of image formats available each with a specific use case. I bet most of us wouldn’t have come across 90% of the image formats listed on Wikipedia.
Though a modern approach to Android is to go to SVGs, and skip pixel hell completely. Incidentally, you can use SVGs for modern web (with appropriate fallback for older browsers) and Windows UWP development. Left in pixel darkness is Apple ☺. Though you still have to select l 1x and pixel alignment for crispness and sizing of SVGs but at least you don’t have to produce tons of PNGs anymore.