Louise Pentland, also known as Sprinkles of Glitter, is one of the most popular YouTube bloggers in the UK. She speaks to Emma about her career and following. What is it like to be a celebrity online?

How much of ourselves should we present on social media? Amalia Ulman is a performance artist and the creator of "Excellences & Perfections," a project which aimed to demonstrate how femininity is constructed online. Ruby Elliot, known as Rubyetc, is a British illustrator who takes a far more open approach. She uses social media to express her own struggles with mental health.

With the rise of live streaming websites and apps like Facebook Live and Periscope, how should harassment and crime shared online be tracked? And what responsibility do we have as viewers? Rossalyn Warren is a Senior News Reporter for Buzzfeed UK. Steve Shepherd is an Operations and Media Consultant for the UK Safer Internet Centre.

And, we discuss social media's impact on social justice and politics. Patrisse Cullors is one the founders of the Black Lives Matter Movement, which started online and has resulted in an international outcry against police brutality and institutional racism. Emma Dabiri is a cultural commentator and teaching fellow in the Africa Department at the School of Oriental and African Studies. Mollie Goodfellow is the Editorial Assistant for the Sky News Political Team. Show less