SharePoint is a great platform for intranet, and the new version SharePoint 2019 and SharePoint Online is getting even better every day.
Video: Why SharePoint Search is Awesome! How to use SharePoint Search | Jean Thirion (4 min)
Powerful content discoverability via full-text search
Rich workflow capabilities (e.g. approval & distribution processes)
Document Accessibility (over the web and via Office programs)
Information Management Policies (e.g. Document retention policies)
Compliance suitability (e.g. Email archiving)
Great for storing both structured and unstructured content. (e.g. meeting workspaces, ad-hoc lists, project workspaces, company portal)
Highly customizable and extensible