Something brought you to this website about yoga. Maybe you are hoping to relieve a sore back, to achieve more flexibility and strength, maybe you are looking to find some peace of mind.
There is a good chance that yoga may help you with many of these things.
However, there is also the possibility that it will give you so much more.
The Iyengar Certification Mark
This is the certification mark used by Iyengar yoga teachers, entitling them to use the name of yoga master BKS Iyengar and his teaching method.