Most great performers have what is commonly known as good stage presence. Stage presence is the overall impression created in the minds and emotions of the audience by the performer.
This impression is created partly by the drama of the music and the visual experience, but largely by the individual personality of the performer. As always, there is much to be learned by watching other performers. It is essential for aspiring performers to see professional singers, musicians, actors or other entertainers perform live as often as possible. You can do this by going to shows or watching performances on DVDs or television. Notice how each performer communicates with both their ensemble and the audience. Analyse their use of both spontaneous and choreographed movement. Watch how the music is expressed through their bodies and facial expressions, as well as through their sound. Notice whether they use humour or not, or any other elements of public performance you can think of. All these things can be learned and developed and can be described as various aspects of stage craft.