The #include<bits/stdc++.h> statement is a shorthand way to include a large set of standard C++ libraries in a single line. It is a non-standard header file that is supported by some C++ compilers, particularly the GNU Compiler Collection (GCC).

When you include this header file, it effectively includes most of the commonly used standard C++ libraries, such as iostream, vector, algorithm, string, map, queue, set, and so on. It saves you from the effort of including individual headers for each library you want to use in your program.

Using #include<bits/stdc++.h> can make your code shorter and more convenient, especially in competitive programming and quick coding tasks where you need to include multiple libraries. It eliminates the need to remember and include each library separately, allowing you to focus on writing the code logic quickly.

However, it's important to note that #include<bits/stdc++.h> is not a standard header file defined by the C++ standard. It may not be supported by all compilers, and its availability can vary depending on the environment. In production code or larger projects, it's generally recommended to include only the necessary individual headers explicitly, as it provides better control and ensures portability across different compilers and platforms.