Happy to help :) I think compression algorithms are super cool, and zlib is a nice example of how just two simple techniques (Huffman coding and dictionary compression) can combine to usefully compress nearly any real-world data.

Newer compression algorithms like zstd, brotli and lz4 basically just use these same methods in different ways. (There's also slightly newer alternatives to Huffman coding, like Asymmetric Numeral Systems and Arithmetic Coding, but fundamentally they're the same concept).