Google announced Thursday that it has purchased Polar, a startup that provides services for online polls.

The Polar team will work on the search giant's social network Google+, which the company said last October has 300 million users who actively view the main news page or feed, according to CNET. Neither company has revealed the terms of the deal.

The startup lets people create and participate in polls with their smartphones and tablets. Luke Wroblewski, founder of Polar, said the company has had over a billion polls in the last eight months, and that it also had 1.1 million active voters in September.

Google will shut the service down by the end of 2015, VentureBeat reported. Dave Besbris, vice president of engineering at Google+, said the Polar team will focus on making the social network "as beautiful and simple to use as possible, especially on mobile devices."

Besbris wrote on Google+ that he was "thrilled" to have the team join the company.

Polar said that deal will not hurt current users, adding that its publishing tools will remain available until the end of the year, Android Headlines reported.

"We've also built a simple way to download and save an archive of your Polar polls and data- they're yours after all!" the startup said.

The deal is the latest move made by Google to bring more features to Google+, such as adding the company's videoconferencing service Hangouts to its enterprise software in July, CNET reported.

Google+ joins other social networks that have added polling features to their services, such as the mobile app Secret, which gave users the option to anonymously post polls to its service in August.