According to many scientists, a significant part of human communication is non-verbal. These include the expression of the face, the position of the hand, the gestures, the eye gaze. When speaking, the speaker uses non-verbal communication in almost the same way as speech itself. That's when the audience equally experiences your gestures as well as your speech, and therefore it takes a lot of attention and constant improvement of non-verbal communication. This is especially due to the fact that non-verbal communication is sometimes difficult to follow by the speaker himself, therefore the practice of doing so should be done as often as possible, so that it will become an integral part of the speaker's attitude and speech.
The answer is: non-verbal cues.