Struggling Twitter marks its 10th year with uncertain future

Twitter marks its 10th anniversary today, with the social media site having hosted some of the biggest social movements of the last 10 years, yet uncertainty still hangs over its future.

The site is struggling to attract new users, has seen share prices tumble, and faces continued questions over how it handles abuse.

Five hundred million tweets are now sent every day, with 200bn posted every year and hashtags such as #JeSuisParis in the wake of the November terrorist attacks in the French capital dominating international debate online.