Google has added a Twitter-esque "Trends" feature to its Google+ social network service that lists the most popular topics on the site.
Google made the update on Friday without any official announcement and the tool shows the 10 most popular discussions taking place inside Google+ after a user has condusted a search from within the social network.
The tool can also be customised to display the most popular search terms from the entire Google+ community, specific circles of contacts or just your own search terms while on the service.
Subjects to trend on Google+ since the feature's introduction include the latest Twilight film Breaking Dawn, musician Bruce Springsteen and actress Mila Kunis.
The arrival of the Trends feature follows Google's recent introduction of Google+ Pages, which lets companies create profile pages to connect and interact with users and other businesses on the site.
In October, Google axed a number of its earlier social networking products, including the Buzz tool that caused a series of legal headaches for the firm, so it could focus on the development of Google+.
Facebook's Mark Zuckerberg dismissed Google+ as nothing more than "a little Facebook" in an interview on US television at the start of November.
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