These tools function similarly to the spelling and grammar checking tools. The main difference is that for each item that Editor finds, it will give a brief description as to what the problem is to help inform you in how to remedy the error. For example, for this document, the "Vocabulary" tool suggests that I should change my word choice because "more specific adjectives are clearer and add impact." I tend to agree, so I'll make a change to that specific phrase within this article before publishing.