What are Site Designs? Modern SharePoint Site Designs are a step above modern themes in SharePoint Online. When a site is provisioned, the site design script is executed. The script can do many things including setting the theme, updating the…
One of the new features rolled out recently to SharePoint Online is the ability to create a newsletter digest. It's possible this has not rolled out to all tenants yet. If you do not see the option, you may get it before long.
Branding for SharePoint sites in Office 365 http://www.abelsolutions.com/branding-sharepoint-sites-office-365/
A content type is essentially a template for content. Out of the box, SharePoint provides many content types including Item, Document, Announcement, Issue, Task, and many more. You can, and should, create your own custom content types for your own content.