Social media has become a major factor in the world. For many of us, it is how we keep up with what our friends are up to, even if they’re on the other side of the planet. It has also played a big part in world events. Twitter was used to organise protests and report on events during the Arab Spring, for example. On a more shallow note, Twitter is a great way to keep up with what your favourite celebrities are up to – as long as they don’t just use it to Instagram pictures of their lunch!