There are reasons why Facebook page profile images become rough and blurry, along with solutions, so taking notes.

・Reference: Facebookページのプロフィール画像がもやもやと不鮮明になる理由とその対処法を考えました | 素材屋小秋Lab

All images uploaded to Facebook are compressed in JPEG format, which causes “mosquito noise” that leads to blurriness.

The solution is that “making the colors of illustrations and logos more complex will make them somewhat better.”

That’s all from the Gemba regarding Facebook image quality optimization.