Because Tamilyogi has no moderation, the "pop-under" ads often feature adult dating sites, gambling (casino) promotions, and potentially phishing scams disguised as "Video Player Updates."
I should search for 1tamilyogi.com to see its purpose. Maybe it's a Tamil movie or entertainment website. Tamil entertainment often has sites offering movies, shows, or related content. The "upd" part could mean updates on movies, releases, or news. 1tamilyogicom upd