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Tell me, how does deflate differ from gzip? And can I enable gzip and deflate compression simultaneously on the site? And is it necessary?

"Group encoding" (compression algorithm) is an RLE algorithm? Or are there any more?

Actually, this is the question. I just started to understand this algorithm. On habr or in this material (the second downloa ... understand, for example, where is the coordinate of a pixil, and where is its color? Can someone share links on this topic?

Every year, the compression algorithms are improved, something new appears, or a modification of existing ones. Question: ... UTF-8 While on the rumor, but it is already relatively long ago, the algorithm PPMd, PPMz. Is there something more perfect?

The compression algorithm used in zlib is almost the same as in gzip and zip. How do they differ?

First: Is it possible to turn the resulting sequences 0 and 1 into the SAME text after compression? Secondly: Is it possible to compress something other than text, if so, how to do it?