This new update features makes the interaction between the Blogger is very pleasant and approachable. In the post editor when you want to inform or remind someone you just add a plus sign '+' in front of their profile name. Blogger automatically inserts a link directly to the Google+ page mentioned. Not just only that, once you publish an article with you tag your friend in it they'll be notify immediately and automatically.  

  

Figure above illustrates the "Tag" your friends or even a community page. Blogger will automatically lists your friends and you just click to select who you want to tag in.