As a copy editor, your responsibilities and duties include reviewing written material, called copy, before it is put into print or posted online. You examine the material for grammar and spelling mistakes and structural errors. You also ensure that the tone, tense, and style meet the guidelines set out by the publisher. If you work in journalism for the copy desk of a news organization, you not only proofread but also fact check and make sure there is no slanderous content. You also check headlines to ensure they are attention grabbing and grammatically correct.