Simply put, proofreading is the checking of text prior to publication, whether in print or online, to ensure that it does not contain any mistakes.
Proofreading takes place after the final edit and provides a last quality check before publication to ensure that a document, manuscript or other piece of writing is error-free.
The responsibilities of a proofreader vary between companies but I personally will check for:
• Spelling mistakes
• Punctuation errors
• Grammatical errors
• Page numbering
• Headings (font, size and style)
• Font size and formatting
• Correct captions on pictures and tables
• Text alignment and spacing