The term criticism essentially refers to the written discussion of works of art. This discussion is often scholarly but can be conducted in news papers and magazines as well as in academic texts.
You usually think of criticism as a negative thing, meaning that you are saying bad things. However, criticism can also be interpreted as meaning feedback. In literature, evaluation is a better way to think about it. You are evaluating and describing.
Usually, "literary criticism" refers to the attempt to analyze and understand literature by placing it in a context or contexts. For example, one might study a play by Shakespeare by placing it in a historical context, or an economic contetxt, etc. Or one might try to analyze the ways language is used in the play. "Analysis" or "study" would probably be better words than "criticism," which sometimes carries negative connotations.
In common parlance criticism means fault finding.However,literary criticism is not just finding the faults only.A critic's implied responsibility is to suggest some better ways of expression or interpretation.It is nothing but an evaluation.In any case the purpose of the critic is twofold---first,he has to point out the defects/faults and then he has to show the proper way to correct those faults.
In common parlance criticism means fault finding.Literary criticism ,however, is not just finding the faults.The critic's purpose is to show some better ways of expression or interpretation . In its simplistic meaning it can be called evaluation also.In any case the job of a critic is twofold---at first he has to point out the faults and then he has to show the ways to correct that fault.