Google updated its mobile web app for Google+ with a couple of new features. The first is the addition of the “What’s Hot” stream, which aggregates the most popular public posts on Google+ at any given time. The second is the ability to see specifically who +1′d a post, rather than just the +1 count itself.
The What’s Hot stream is accessible by swiping to the right of the Circles stream. It brings the web app’s carousel of streams at the top into play. To see who +1′d a post, simply tap on the +1 count as you might expect and up pops the list.