Microsoft Editor is an AI-based free tool to provide spelling and grammar support while writing in any editors to help you write confidently and communicate your message effectively, but you will get additional capabilities to access advanced grammar and style refinements if you have a subscription to Microsoft 365 (Office 365).
Recently, the Microsoft Editor gets a big update that adds the ability to view spelling, grammar, and other intelligent suggestions quickly. It also adds a dedicated and simplified view for a more contextual and accessible review experience.