Wave motion is nothing but a mode of transfer of energy from place to place periodically without material transport.
Four characteristics of wave motion are
(i) It is the disturbance which travels forward through the medium but not through the particles of the medium.
(ii) Each particle receives vibrations a little later than its preceding particle.
(iii) The wave velocity is different from the velocity of the particles with which they vibrate about their mean positions.
(iv) The wave velocity remains constant in a given medium, whereas particle velocity changes continuously during its vibrations about the mean position.