Mentioning people in Gmail—and having their email contact be immediately linked—is a feature that can save you and your email recipients a lot of time. Similar to mentioning a person on Facebook, this new Gmail feature allows your recipients to contact the tagged person with just one click.
Between the endless stream of marketing emails, unimportant notifications and the occasional forwarded chain email sent by an old-fashioned relative, it can be difficult to make sure that you're seeing the important messages in your inbox. Creating Gmail filters can help you sort through the chaff and never miss another important email.
Google described the new interface as a fresh, clean look for Gmail on the web with some exciting additions.