Which Indian work is known as the 'original poem'?

The main storyline of the Ramayana is a vivid one, with heart-stopping scenes. In terms of codification, literary description, compared with the Mahabharata, there is a big improvement, so it is known as the "original poem", but also shows that ancient Indian literature has developed greatly. The Ramayana has had a profound influence on later Indian and world literature. Its compositional methods and materials are often followed in later works.