Azure AD? Why to use it?

Having worked with Azure and getting certified in that field, I thought it is time to talk a little about Azure AD and why we should use it. So I prepared a video about this concept and published in my YouTube channel. Do not forget that this video is not a "How To" video, because basically you can find so many videos out there on how to configure Azure AD, instead, in this video I explained some basic concepts of synchronization and why we should even use Azure AD. I hope you find this video interesting. :)