Want to Mention someone on Google Plus? You Have Options
You can mention people in your Google Plus posts in a variety of ways though the most common method I see on Google Plus is by using the plus sign before their name, e.g. +(name). The ‘@’ symbol, made popular on Twitter and now, like the hashtag is prevalent in our culture, can also be used in lieu of the ‘+’ sign.
When you mention someone in your Google Plus post, Google Plus will send them a notification. They may or may not see this notification depending on their notification settings. They’ll be able to see the post in which they are mentioned however.