Copy edit­ing, also known as line edit­ing, is essen­tially the process of mak­ing each pas­sage work. It will include gram­mat­i­cal cor­rec­tions done inline as well as notes made for awk­ward sen­tences, word use rec­om­men­da­tions, and other sim­i­lar cor­rec­tions. It will not address larger issues within the book as a whole. This is the most com­mon form of edit­ing I do. Struc­tural and devel­op­men­tal edit­ing focuses on con­tent. This will include notes about pac­ing, tone, char­ac­ter devel­op­ment, con­ti­nu­ity, and every­thing else that makes a book tick. This is nec­es­sar­ily some­what sub­jec­tive, but hav­ing an expe­ri­enced edi­tor give you unbi­ased feed­back can be invaluable.