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Our detailed dictionary of internet terms

Back Up

To make a copy of necessary files to ensure that you always have a current record.

Many dynamic websites have information stored in databases that continually changes as visitors and administrators make changes to the website. It is important to keep a regular copy of these changes so if a problem occurs the website can be bought back to a state not too far back in the past, particularly important with online stores where customers orders are recorded or stock is changing on a regular basis.

Massive problems can occur if a website is not backed up on a regular basis and lost files or data could render a website useless.

The files are stored on a web server, although reliable there could be occasions for instance if a data centre went bankrupt or a severe virus affected the state of the information stored. This could cause the website to be lost forever.