YouTube is an online video sharing platform that allows billions of users to watch and share originally created videos. It was created in 2005 by three former PayPal employees and was acquired by Google for $1.65 billion in 2006. YouTube is now the third most visited website globally and sees over 4 billion daily video views. Major brands like Home Depot, Nike, and universities successfully use YouTube as a marketing platform to reach large audiences by regularly posting engaging video content. Maintaining an up-to-date YouTube presence is important to avoid brand damage from outdated channels.