A Build converts human-readable source code into a computer-executable program. It's like a factory assembly line transforming raw materials into a finished product. This process is fundamental for any software, from mobile apps to video games, ensuring code becomes a functional application.

The core stages include fetching source code from a repository like Git and managing dependencies—external libraries needed for the project. The heart of the build is compilation, where a compiler translates code into machine language. Automated testing runs unit tests to catch errors before packaging the final Artifact.

Confusion often arises between building and deploying. A build creates the software package (like an .exe or .apk), while deployment installs it. Automation is critical for repeatability, as manual builds are error-prone. This structured process is the backbone of modern continuous integration and delivery pipelines.