Surya Namaskar is an important aspect of the practice of yoga. It is also called Sun Salutation, an ancient yogic practice of paying respects to the sun and a set of 12 yoga poses which can be performed while chanting 12 different mantras. This routine is generally considered to be performed at dawn. The sequence of asanas or poses stimulates all organs, systems, muscles, and chakras. Among other health benefits of Surya Namaskar, it is also said to cultivate stillness and concentration of the mind.

12 steps of Surya Namaskar are mentioned in sequential manner below:
1. Start with the mountain pose
2. Raise your arms in an upward salute
3. Move into a standing forward bend
4. Enter a half standing forward bend
5. Exhale and return to the forward fold
6. Get into a plank pose
7. Lower yourself into a low push up
8. Inhale and enter an upward dog pose
9. Get into a downward dog pose
10. Move back into the standing forward bend
11. Inhale and move back into the upward salute
12. Exhale and return to the mountain pose.

If you want to check how all of these steps are performed, please refer to the following link:
https://www.wikihow.com/Do-the-Surya-Namaskar