In the spirit of NOT repeating everything word for word that people have already laid down, I can point you to some very well written articles explaining the basics of Windows Update for Business.
That being said, before you dive in, here’s my pre-2 cents / summary of Windows Update for Business (WUB):
Windows Update for Business is not (yet another) cloud service.
Windows Update for Business is not WSUS in the cloud. (See first bullet point.)
Windows Update for Business is a mere SINGLE Group Policy Setting.
The point of WUB is to use the GP skills you already have to create “collections” (my word) or “rings” (Microsoft’s word) dictating when some machines will accept updates and others will not. (What? No / need GP skills? www.gpanswers.com/training )
You can still use WSUS if you want to; but the point is that Microsoft is basically saying “trust us with the update blocks.” Here’s the difference between WSUS and WUB:
WSUS enables you to get really granular. But that’s more work because you need to (theoretically) test then approve each update.
WUB enables you to get LESS granular about your choices, but instead trust that Microsoft has pre-vetted the patches by the time those patches make it to you.
You still need to use WSUS until your whole universe is Windows 10; then you can (theoretically) abandon WSUS and use only WUB.
So, here are the good articles I’ve seen explaining WUB.
Jeremy Moskowitz Enterprise Mobility MVP & Lead Trainer
Jeremy Moskowitz is a former Microsoft Enterprise Mobility MVP and founder of MDMandGPanswers.com and PolicyPak Software.
Jeremy teaches Group Policy hands-on training to IT administrators who want to make their business more secure by using Group Policy.
He runs MDMandGPanswers.com, a forum for Group Policy enthusiasts and also founded PolicyPak Software, an innovative add-on that allows admins to dictate, enforce and remediate application settings. Jeremy is also author of several Group Policy Books, including “Group Policy: Fundamentals, Security, and the Managed Desktop, 2nd Edition”.
He has been seen speaking at Microsoft TechEd, Microsoft MMS, Windows Connections and many others.
Jeremy has performed Windows NT, Active Directory and Group Policy planning, training and implementation for some of the world’s largest organizations.
Jeremy is available for consultations with your company, speaking at your events, or writing custom publications.
The Definitive Guide to Windows Installer Technology
James I. Conrad, MCSE 2003, Server+, A+, Certified Ethical Hacker.
For years, James Conrad has been a sought-after consultant and trainer for Fortune 500 companies. James has been an exam writer for Microsoft MCSE exams and was a key contributor in determining MCSE exam objectives in the Microsoft Certification and Skills Assessment division.
He has trained and consulted for Intel, UCLA, Raytheon, Compaq, Hewlett-Packard, MCI Worldcom, Sprint, Exxon-Mobil, Boeing, Lockheed Martin, the U.S. Department of Justice, the Bureau of Land Management, and many others.
James writes internal training materials for current Windows products and has authored Windows 2000 Server for Computer Associates, and Windows XP Desktop Administration for the Windows Consulting Group, among others. He has also been a technical editor for many books including The Tips and Tricks Guide to Securing .NET Server by Roberta Bragg and Windows Server 2003 Security: A Technical Reference also by Roberta Bragg. James also wrote the CompTIA Server+ college curriculum for Thomson Learning.
James wrote five Personal Test Center Windows 2000 Professional exam preparation tests for Coriolis. James has also written the popular Windows 2000 Server, Windows 2000 Professional, and CompTIA Network+ certification books for ComputerPrep. James also served as the technical editor for Thomson Learning’s Network+ college curriculum. James is currently the lead instructor for CBT Nuggets, a leading Microsoft, Cisco, and Linux video training source.