Mountain Pose (Sanskrit: Tadasana) is a foundational standing posture typically done at the beginning of a practice session.
It is a great place to start from. Sun Salutations and many other standing sequences begin from Mountain Pose. To find strength and presence in other asanas (postures), it is important to have a strong Mountain Pose from which they originate.
This posture invokes the strength of mountains. The feet root down into the ground, creating connection to the earth, while the crown of the head reaches for the sky, cultivating connection to the heavens above.
Mountain is an excellent place to ensure you have proper posture. It is here that you may notice any postural tendencies such as sagging the shoulders or arching the lower spine, etc. Alignment is essential in Mountain Pose, as it will carry with you throughout the rest of your practice.