Office 365″ refers to subscription plans that include access to Office applications plus other productivity services that are enabled over the Internet (cloud services), such as Skype for Business web conferencing and Exchange Online hosted email for business, and additional online storage with OneDrive and Skype minutes for home.
Many Office 365 plans also include the desktop version of the latest Office applications, which users can install across multiple computers and devices. The full, installed applications include: Word, Excel, PowerPoint, OneNote, Outlook, Publisher, and Access. (Publisher and Access are available on PC only.) And you can install them across multiple devices, including PCs, Macs, Android tablets, Android phones, iPad, and iPhone. When you have an active Office 365 subscription that includes the desktop version of Office, you always have the most up-to-date version of the applications.
All Office 365 plans are paid for on a subscription basis, monthly or annually. (Reference: Office 365 for business FAQ)
In this step by step guide series I will cover below topics and hope this will help you on understanding Office 365 setup and configuration.