In relation with What guidance should be given when edits are rejected?, it occurs to me that we aren't providing much guidance to reviewers regarding when they should approve edits.
“Approve edits you know are correct” — yes, sure, but when is an edit correct? Only for a small minority of suggested edits does it come down to the factual correctness of some statement.
At a minimum, there should be a link to the help page on editing here. Plenty of people who reach the suggested edit review aren't intimately familiar with the rules and etiquette of editing on Stack Exchange.
In addition, there should probably be a paragraph or so, tailored to the type of post (question, answer, or tag wiki) to guide reviewers as to what edits are acceptable. Or should the review screen show the same bullet points that show up in the right margin when editing?
What guidance should be shown to suggested edit reviewers?