The manual page isn't an introduction, it's a reference. It says what it is (the GNU Project's implementation of the AWK programming language), and goes on to

The manual page isn't an introduction, it's a reference. It says what it is (the GNU Project's implementation of the AWK programming language), and goes on to talk about how the program is operated and how the language works, but it doesn't explain why or where you'd use this tool That's fine for a reference manual but it's a big omission for an introduction.