Correct typos

 

Correct basic grammar (unless changes affect author/character voice)

 

Correct punctuation

 

Make style consistent: spelling, capitalization, hyphens, dashes, italics, ellipses, etc.

 

Identify content inconsistency from chapter to chapter: character hair color, eye color, ages, wardrobe, motivations, setting, etc

 

Fact checking (i.e., geography, dates, accuracy of plot timeline)

 

Identify inconsistencies

 

Identify plot holes

 

Identify any potential copyright issues (song lyrics, poetry, photos/artwork, other copyrighted material not owned by the author)