The amount of time that any particular visitor spends on a site. Webmasters are usually not interested in individual visit duration’s, but rather in the average visit duration for all visitors to a site. Analysing visit duration is tricky. If the average visit duration is short, it could either mean that the average visitor does not find the information they come looking for, or it could mean that they find it very quickly. The type of site and the type of information offered must be taken into account if visit duration is measured.