A data center is a facility which contains a lot of servers. The web servers can be used for numerous functions - web hosting, file and photo storage, computing, etcetera. All big businesses that provide online services have their servers in one or several data centers as such a facility can offer the desired environment and security for the info located on the machines. Including environmental settings for the humidity and temperature in order to guarantee the best performance and long life of the web servers, backup power generators, hardware monitoring and last, but not least, physical protection as to make sure that your information cannot be accessed by an unauthorized third-party. A poorly performing data center can very easily undermine the services that a company supplies.