18 Most Popular Social Media Apps in 2017: Should Facebook Worry?

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16. Flickr

Monthly Active Users: 112 million

Flickr is up next on our list of the most popular social media apps in 2017. This, too, is a surprising presence on the list since it focuses on photography. However, over the years, it has turned into a real online community for those passionate about photography and has led to many connections between professionals in the industry.

Pixabay/Public Domain

Pixabay/Public Domain

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