Answer :
Proofreading.
A proofreader’s work it to check text before it is published or printed to make it complete and free of errors. Very many people confuse a proofreader’s work and a copy editor. However, there is a major distinction. A proofreader ensures content is correct and free of grammatical, punctuation, syntax, spelling, and other such errors. He or she analyzes a story or a publication on a visual and content level for final changes. On the hand, a copy editor’s job is to rewrites and revises.