Why do pilots say “rotate” when taking off, also some say it when lowering the nose during landing?

Question

Why do pilots say “rotate” when taking off, also some say it when lowering the nose during landing?

In: 113

Answer 1

It might not be the pilots saying it. It is likely to be the guidance computer telling the pilot that they have reached the necessary speed needed to begin rotation of the plane about its lateral axis, i.e. pull the nose up.