Why does @Override automatically appear in intellij idea?

Question

IntelliJ IDEA

Hello! I am taking a course for a beginner in Java, in the intellij idea editor, @Override lines appear before some methods. They appear automatically. Actually, on one method, I get an error with this line, and if I comment it out, it works. I read it on the Internet, but since I'm new to Java, I didn't really understand what kind of annotations. What are these lines and can they be removed?

Answer 1

Indicates that the method is being overridden. Those. stores the same input and output parameters as in the base class. If it does not compile with it, then they made a mistake with their types or number.