This document outlines the key concepts of literary criticism including:
1) It defines literary criticism as the practice of describing, interpreting, and evaluating literature.
2) It lists the main functions of literary criticism as criticizing literary works, verifying literary theory, and supporting literary history.
3) It describes the different types of literary criticism such as theoretical, practical, and historical criticism and provides examples of types of practical criticism like impressionistic, analytical, and judicial criticism.