what is the point of the poetics?

Aristotle's Poetics aims to give an account of what he calls 'poetry' (for him, the term includes the lyric, the epos, and the drama). Aristotle attempts to explain 'poetry' through 'first principles' and by discerning its different genres and component elements. His analysis of tragedy constitutes the core of his discussion.

it seems very good critic to me i would like to know more about him.