SharePoint is the tool Microsoft provides which can improve my work and the result of my work. It can also improve the work of my team, my department, my company or my partners.
You already know the following graphic:
You can use sites and communities to store and manage information as well as to collaborate with colleagues.
You can use content management features to set up compliance features for the information stored.
Content management also allows you to use information in your already existing working environment like Microsoft Office.
Search allows you to retrieve information independent of their storage or to find people with the skills needed.
Insights allow you to get, to prepare and to visualize (business) information stored in a different repository.
SharePoint provides a solution to all your information management needs with a secure and remote access.
Furthermore SharePoint can be enhanced with no code solutions called Composites.
The great thing is that SharePoint has a lot more facets and advantages than outlined here.
What is SharePoint - Overview