Into C++ programming language, '
this' is a keyword that refers to the current instance of the class. There can be 3 main usages of this keyword in C++.
- This can be used to pass the current object as a parameter to another method.
- This can be used to refer to the current class instance variable.
- This can be used to declare indexers.

For More Detail Please Read This Article :-
Pointers in C#