If you are using a modern site in SharePoint Online, you might have noticed that there is a new footer / social bar control which contains actions that allow you to like a page, see the number of comments and page views. The social bar with like and comment capabilities This is a very simple control and might be useful to you when building some social solutions like for example when building your own news page roll-ups or controls.
The SharePoint item REST API has its limits. One (or two in this case) of these limits is about returning values for fields you specified, more in particular when using lookup- or managed metadata fields. The problem with the lookup field occurs when it references a list from another web.
A project I was working involved retrieving all external / guest users that have been added to Office 365 and especially to Office 365 Groups. As it had to build in to an Office 365 application I choose to work with the Microsoft Graph. First thing I did was retrieving all users with the standard API call: