If you are instead looking for a "readme" text or a description often bundled with such a zip file, it typically contains installation instructions: Extract the contents of the .zip file.
: Adjusted the stats for specific late-game Sky Armors and fixed scaling issues with certain character skills. Bug Fixes : Chained.Echoes.v1.04.zip
Based on the filename , this likely refers to a compressed update or installation file for the indie RPG Chained Echoes . If you are instead looking for a "readme"