As of December 2014, the best rated TV serial on Star Plus is Diya Aur Baati Hum. The show boasts of a TRP rating of 12.4. Its TVM rating is 12.9, according to MT Wiki. The show has a TVT or Television Viewership in Thousands score of 11223.
The high TVM rating, TRP rating and TVT score reflect the popularity Diya Aur Baati Hum enjoys. The show began on 29 August 2011, and since then, its protagonists, Anas Rashid and Deepika Singh have been wooing viewers with their beautiful and emotional portrayals of the characters, Sooraj and Sandhya Rathi, according to Wikipedia.
This soap opera is set against a middle class background in the small town of Pushkar. It is here that Sandhya, who is married to Sooraj, a self-made sweet shop owner, dreams of breaking out of her confines as a dutiful daughter-in-law, to achieve her ambition to become an able police officer. It is this intricately woven story of a typical Indian woman who is restricted more or less to household duties, but hopes to pursue her dream profession, that has endeared the show to the masses, states Wikipedia.
Diya Aur Baati Hum has been translated into 8 languages, including Urdu, Sinhalese, Romanian and Bulgarian, which further indicates how popular the serial is throughout the world.