Alignment is the word that is used in yoga when we talk about the ideal way that a pose should be done. Alignment would be how we position our bodies to achieve the full benefit of a yoga pose without having any discomfort or risk injuring ourselves. Some benefits of body alignment are here.
By performing body alignment, body postures are improved and leads to an improved body balance.
Performing body postures puts pressure on the spine, including the intervertebral discs, ligaments, and muscle which leads to relaxation of lower back.
Poor body postures leads to headaches, so performing body alignment will improve body postures which help eliminate tension headaches.