Once you click on the tab, you'll be taking through to a world map which is covered in blue dots, each one represents a person who is using the Facebook live function.
When you click on the dot you will be transferred to watch your chosen live video and immediately able to join the people filming at that exact moment.
You could be entering into the strange goings on of people across the globe as it allows anyone to share whatever they're doing.
Facebook's chief executive, Mark Zuckerberg, believes that this will become the next big way we communicate.
"Live is like having a TV camera in your pocket. Anyone with a phone now has the power to broadcast to anyone in the world," he said.