Shree Ram Chalisa is the forty verse prayer dedicated to Lord Ram. Rama or Ram (राम) (రామ) or Raamar (Tamil) is the seventh avatar of the God Vishnu in Hinduism, and a king of Ayodhya in Hindu scriptures. Along with Krishna, the eighth avatar of Vishnu, Rama is considered to be the most important avatar of Vishnu.
Ravana is better known and remembered as the demon king who kidnapped Sita whom Rama defeated and killed, in a battle fought at Lanka.
Ravana played his role as a villain, but it was that of a much-needed villain, that brought balance to the equation. No wonder there are many people in the world, who still worship him.