The video tutorial covers the C++ Standard Template Library (STL) and its string class. It begins with an introduction to STL and strings, followed by various methods to declare and initialize strings. The tutorial then demonstrates how to find substrings using the find method, append and insert text into strings, and replace or modify string content. Practical examples are provided to illustrate each concept, emphasizing the importance of understanding the string class for effective programming in C++.

What methods can be used to insert text into a string?

Explain how to replace a substring in a string.

What are the benefits of using the string class in C++?