You probably already know that the "Virtual Private" setting comes from a server that is logically partitioned to separate Hard Disk, Memory and CPU time.
These partitions get their own OS and software and look like independent machines. But they are managed by a sort of "Super OS" that handles the creation, maintenance, and deletion of virtual machines. If you're looking for VPS hosting, you can check out intergrid.com.au/vps-hosting.php.
Super OS is a fairly complicated arrangement, however, and in order for you to benefit from seamless uptime and reliability have your VPS host needs to be technically competent enough to keep abreast of any issues.
Cues to make sure you are dealing with technically competent VPS host included
Security: A secured VPS host is the number one priority should be essentially handled by the service provider.
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Proper security checks and mechanisms should be in place to ensure secure transactions. Availability of SSL (Secured Socket Layer) Certificates is important even if you are not going to use one.
Yes, they allow to secure sites online business management and credit card payments, but they are also an indicator that the provider has the experience and capability in the field of security.
No-Fuss Web Space Management: As the company's business grows and requires more storage space existing web data may be tight and you will need a scalable webspace solution.
VPS host you should be in a position to migrate, transition and provide more disk space without affecting any existing configurations and settings or requiring downtime.
A scalable solution means your customers continue to be served even when you do upgrade, the solution still means the potential for downtime, missed sales leads or unhappy customers.