What's string? Why we use it? What's it advantage?

Question

I'm reading the string section but i don't understand why we should use it. And what's the difference between iostream and strings

Answer 1

basically string is a word for add any word u had a need of string.
iostream means input output stream which is added for accessing the input-output functions in cpp
strings is added for accessing different functions of string like strcpy- string copy function, strcmp- string compare function, etc.