A data center is a special facility in which providers store the hosting servers used for their offline or online services - hosting, mail servers, computing, file storage, etc. The data center offers the environment for the hosting servers accommodated there to function at their greatest capacity while sustaining their life. This is done by supplying optimal environmental conditions - temperature, air humidity, protection against disasters, and so forth. All data centers also have electric power and Internet backups, which are a safeguard in case there are infrastructural difficulties, and which guarantee the uninterrupted operation of the machines and the access to them. The limited access to such facilities adds an extra layer of security against unauthorized access by third-parties. If you use the web services of any firm, a good data center will considerably raise the level of the service and your user experience.