Wikipedia defines it as follows: "A unique visitor is a statistic describing a unit of traffic to a website, counting each visitor only once in the time frame of the report. This statistic is relevant to site publishers and advertisers as a measure of a site's true audience size, equivalent to the term "Reach" used in other media."In reality each unique visitor is one computer being used to visit a website - so our figures mean that 115,000 computers are used to access Top-Consultant in a month. If you visit our site ten times in a month from the same computer then you would be counted as one unique visitor. But if you visited from your home computer and from your work computer then you'd be counted as two unique visitors even though there is only one actual person corresponding to those two unique visitors. Of course this represents double-counting, but offsetting that would be all the internet cafe PCs and all the university and business school PCs where multiple people use the same computer to access a site - and so are counted as one unique visitor even though there were multiple people looking at the site.It's an imperfect metric as you can tell from the above, but within the online industry it's the most closely watched and the one most frequently used to cross-compare the audiences of websites.Tony RestellTop-Consultant.com
