Lord Venkateswara is the main diety of the Tirumala temple, Tirupathi. The lord is an incarnation of lord Vishnu.
He is worshipped by the people with different names like Balaji, Srinivasa, Govinda. Venkateswara means the Lord who destroys the sins of the people. According the Hindu scriptures, Vishnu, out of love towards his devotees, incarnated as Venkateshwara and appeared for the salvation and upliftment of humanity in this Kali Yuga and is considered the supreme form of Vishnu in this age.
Suprabhatam (Sanskrit: सुप्रभातम “auspicious dawn”) is a name given to Sanskrit hymns recited in the morning to awaken the Lord. The most famous is the Lord Venkateswara Suprabhatam recited at Tirupati to awaken Venkateswara.