Editing to ensure correctness, consistency, accuracy and completeness.
I will look for problems with:
Grammar, punctuation, spelling and word usage
Abbreviations, measurements, treatment of numbers, Canadian vs. British vs. American spelling
Logic, factual details, cross-references and citations
Tables, photos, multimedia, and other visual elements and accompanying text
Capitalization, italicization, accented characters--especially when other languages are used in an English context