Vata is the most important among tridoshas. Pitta and kapha are less important. The vata carries them to different places. Like in nature, clouds are moved by wind, similarly vata maves pitta and kapha to move all over the body.
Vata or Vayu is described as Ayu, or life as bala or strength. Prabhu or master and the entire universe itself is travelling under the control of vata. Acharya Charak described Vayu in Charak sutrasthan in 12th chapter in a symposium as Vata.
The reasons behind its important are given below.
These points can also be reffered as vata sworupa or physiology of Vata