Smart Lookup is a way to research words or phrases in your document instantly. If this is your first time using it, you will have to enable the feature.
Office 365 is the brand name Microsoft uses for a group of subscriptions that provide productivity software and related services. For consumers, the subscription allows the use of Microsoft Office apps on Windows, macOS, iOS, Android and Windows 10 Mobile, provides storage space on the OneDrive file hosting service, and grants 60 Skype minutes per month. For business users, Office 365 also offers service subscriptions for e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer.