Standard Gzip compresses files individually. However, "solid compression" is a method where multiple files are treated as a before compression.
It offers much higher compression ratios because the algorithm can find patterns across different files rather than just within one. 12353sckgzip
It uses the DEFLATE algorithm, which combines LZ77 (replacing repeated strings with references) and Huffman coding (using shorter bit sequences for common characters). Standard Gzip compresses files individually