Why the cap on Facebook degrades image quality?

Hat in the Group on Facebook.
In what format and what size it should be, so that when the loading of the image does not appear pixelated.

Attach image quality, which it ouimet FB - the quality is much worse, the pixels are squares around the text and other elements.

5c9b4c6978463081199265.jpeg
March 19th 20 at 08:49
2 answers
March 19th 20 at 08:51
Well, this FB thingy, they degrade the quality of the pictures, so they quickly loaded the users and to experts in web promotion did not fail the server FB results in your life.

Try the largest size.
But I look in other groups of caps of fine quality.
I have many formats I tried - does not help. .don't understand - Devan.Huels36 commented on March 19th 20 at 08:54
@Devan.Huels36what formats tried? - Piper_Watsi commented on March 19th 20 at 08:57
@Devan.Huels36, I mean to take Bolshoi a picture, that is, with the higher resolution. - madisen_Ritchie commented on March 19th 20 at 09:00
March 19th 20 at 08:53
I don't sit on Facebook, but try to upload the SVG if possible .Still vector graphics is vector graphics)

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