C is highly portable and is used for scripting system applications which form a major part of Windows, UNIX, and Linux operating system. C is a general-purpose programming language and can efficiently work on enterprise applications, games, graphics, and applications requiring calculations, etc
Why learn C ?
C is often considered to be the mother of all languages because so many other languages have been based on it.
Though C is simple it is one of the most powerful languages ever created. Considering it was created over 40 years ago, it is still used heavily and is usually in the top 5 or 10 most popular and most widely programming languages in the world.
Learning C can actually make you a better programming in other languages like C++, Java, or C# by equipping you with a mental model of what the computer is actually doing when you run your programs.
By learning how things really work "under the hood", and understand memory space, CPU architecture and so on, you can create more efficient programs, and obtain a huge advantage over other programmers in the process.
If you want to become a better developer, learning C is a great way to start!