System libraries in Linux are like built-in helpers that make things easier for your computer and apps. They provide ready-made functions for common tasks like opening files, connecting to the internet, or displaying text. Instead of every program writing these from scratch, they just use these libraries.

If we didn’t have system libraries, apps would be much bigger and harder to build. Some, like glibc (GNU C Library), are so important that if they were missing, your computer might not even start properly!