Stationary waves form when two progressive waves of the same frequency travel in opposite directions and are superposed. 
Where they are in phase with each other their displacements add up. This forms an antinode. The antinode is the point of greatest amplitude and therefore the point of greatest intensity. Where they are in antiphase with each other their displacements cancel out. This forms a node. 
The frequency of the standing wave is the same as for the individual progressive waves. As the two waves are travelling in opposite directions, there is no net energy transfer by a stationary wave. Particles between two adjacent nodes are in phase with one another, and particles in neighbouring loops are in antiphase. The amplitudes differ along the wave.
Where they are in phase with each other their displacements add up. This forms an antinode. The antinode is the point of greatest amplitude and therefore the point of greatest intensity. Where they are in antiphase with each other their displacements cancel out. This forms a node. The frequency of the standing wave is the same as for the individual progressive waves. As the two waves are travelling in opposite directions, there is no net energy transfer by a stationary wave. Particles between two adjacent nodes are in phase with one another, and particles in neighbouring loops are in antiphase. The amplitudes differ along the wave.