A VPS (Virtual Private Server) can be used for almost everything related to hosting (Apps, websites, blogs, files, data bases, etc). You can have the VPS with a control panel like cPanel/WHM, Plesk, etc which make its management easy!
The control panel which gives a web interface (and API, scripts) to interact with the operating system, services and applications installed on the VPS (or dedicated) server.
A VPS can be used for different purposes from the server role perspective: Describes the role assigned to the server based on which services and applications run on it. These are some examples.
All-in-one servers (Run multiple services at the same time)
You have to take into consideration that servers can be classified into two categories from the server reliability perspective:
From the resources/specs perspective:
High memory servers (For applications requiring a huge amount of memory)
High CPU servers (For applications requiring a huge amount of CPU processing)
High bandwidth servers (For applications requiring a huge amount of network bandwidth)
High disk servers (For applications requiring a huge amount of disk space and I/O)
Additional note: With the huge number of available server offers and providers, comparison is a real challenge. It requires a huge amount of time. Fortunately, you can use Waikey Cheap VPS Hosting. a FREE Meta-Search & Comparison Engine which instantly compares Thousands of VPS, Dedicated and GPU servers from hundreds of providers in 40+ countries.