“In times when websites grow bigger and bigger, it becomes more important than ever to keep the file sizes of your images as small as possible. Sketch can help you here: the two official plugins Sketch Image Compressor and SVGO Compressor take care that your assets are automatically optimized when exporting. You don’t need to do anything at all, except clicking on “Export”…”

Screenshots of the git repositories of 'Sketch Image Compressor' and 'SVGO Compressor'