Linux.com - https://www.linux.com/news/continuous-integration-and-delivery-tool-basics
CI/CD tools are key to today’s agile, container-driven software production cycle. This “explain like I’m 5” overview helps you get started.
Once upon a time, back when waterfall was the primary software development methodology, you could spend months or years working on a single software project. With the help of agile methods, programming cycles were reduced to days or weeks.