Keyboard shortcuts offer the fastest access to content on your Google+. They are generally more efficient because the shortcut starts you at the right spot for new posts instead of scrolling halfway through them. They are also a bit easier on your hands and wrist since you won't have to switch back and forth as often (especially useful for those with joint issues).
With keyboard shortcuts available for the Google+ stream, it only makes sense that there should be a set of them to work on notifications, too.
Without further delay, here are the shortcuts:
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