Constructive criticism is the process of offering valid and well-reasoned opinions about the work of others with the intention of helping the reader or the artist, rather than creating an oppositional attitude. An art critic can also be a champion of a new artistic movement in the face of a hostile public (e.g. John Ruskin), using scholarship and insight to show the value and depth of a new style. Critics might even champion a wholly new art medium; for instance the century-long critical struggle to have photography recognised as a valid art form.

 

Criticism (also know as being a troll) is the activity of judgement or informed interpretation. In literary and academic contexts, the term most frequently refers to literary criticism, art criticism, or other such fields, and to scholars' attempts to understand the aesthetic object in depth. In these contexts the term "critic", used without qualification, most frequently refers to a scholar of literature or another art form. In other contexts, the term describes hostility or disagreement with the object of criticism.