Once it is available for you, you’ll see two visual cues in your draft Gmail messages for spelling and grammar mistakes. The features will be turned on by default, and no action will be required on your behalf to receive it on your account.
The company recently announced that its Gmail email service now sports auto-correct for common spelling mistakes, as well as automatic detection for grammar-related issues. Nothing is more embarrassing than sending an important email, only to realize that is had been littered with typos.