The Microsoft Editor: Spelling & Grammar Checker is a free, browser-based writing assistant. It provides advanced grammar and style suggestions as you type and spelling correction suggestions when you misspell a word. The app can also highlight any spelling or grammar errors as you type and show you what an accurate spelling and grammar look like. 

This extension helps correct your own spelling and grammar mistakes, in addition to helping you to improve your writing style.

In addition, Editor can also suggest words that you might misspell when you’re writing an email or a post on a website, making it easier for you to get your point across. The Editor can also suggest various other improvements to your writing, such as adding extra words to your vocabulary or re-writing your sentences so that they are more effective.