Why is gets dangerous

Question

When learning c it showed the gets function but when running it, it says its dangerous and should not be used
But why is it dangerous

Answer 1

https://en.cppreference.com/w/c/io/gets

"The gets() function does not perform bounds checking, therefore this function is extremely vulnerable to buffer-overflow attacks. It cannot be used safely (unless the program runs in an environment which restricts what can appear on stdin). For this reason, the function has been deprecated in the third corrigendum to the C99 standard and removed altogether in the C11 standard. fgets() and gets_s() are the recommended replacements.

Never use gets()."