Before you publish anything on the web, or whether you want to send any personal or formal mail, it is always a good idea to check your text for any spelling or grammatical errors. Even though Microsoft word offers a good spell checker service, it will not point out whether you have made any grammatical errors in your text or not. Grammarly is an online grammar checker tool which can check your text for spelling errors, grammar, punctuations and give you suggestions for corrections. Apart from that, it also comes with a plagiarism checker which can automatically provide citations by searching the web.