YouTube is a US-based social media and video sharing platform that first broke out onto the scene in 2005.
Since then, it has exploded in popularity and importance, being a platform where careers are made and major advertising and content creation takes place.
The platform was bought by Google in 2006 and is currently one of the most visited websites in the world, second only to Google itself.
However, it has also come under fire for a number of controversies such as copyright issues, misinformation and privacy concerns, among others.