Owing to these Navagraha doshas, folks encounter many obstructions & hindrances of their existence. In order to reduce and negate the malefic doshas or malefic impact of those planets, we conduct many Pujas & Yagnas. An additional etymology indicates that valga implies "to paralyze" and symbolizes the strength of stambhana, https://www.youtube.com/shorts/5VeSyP9JRw0