C language is a great language to introduce yourself to the programming world, because it is simple, easy-to-learn, some concepts are tricky but overall you will not find anything difficult while learning C language. It will introduce you to all the major programming concepts like datatypes, variables, functions, arrays, strings, conditional statements, loops, input/output, data structures, etc., that are the same in other modern programming languages.
If you are a fresher, you must know C/C++ language if you want to crack your college placement interviews. All the services based companies like TCS, Accenture, IBM, etc. hire C developers.