Grammarly is an online tool that can be used to enhance writing skills. It automatically detects and corrects potential grammar, spelling, punctuation and plagiarism mistakes. Users can access Grammarly through a browser extension or mobile apps. The tool checks writing against over 250 grammar rules and provides corrections. To get started, users enter "Grammarly" into Google, sign into the official website using Facebook or email, and then either write or upload a document to receive feedback and suggested improvements.