Owing to those Navagraha doshas, people today face several hurdles & hindrances of their everyday living. To be able to limit and negate the malefic doshas or malefic impact of these planets, we carry out a variety of Pujas & Yagnas. One more etymology suggests that valga means "to paralyze" https://www.youtube.com/shorts/5VeSyP9JRw0