Web Influence Zone
From Seo Wiki - Search Engine Optimization and Programming Languages
Web Influence Zone (WIZ): A web influence zone is a basic measurement of an individual’s or organization’s presence on the World Wide Web. A simple way to obtain a WIZ rating on an organization or a particular individual is to insert their name into a Web search engine and see how many organic, or non-sponsored, results show up. Therefore, the more organic results, the greater that organization’s or person’s web influence zone.
Though many use the term web influence zone each day, the term "influence zone" has been in use since 1952 when a series of maps drawn by G. Chabot depicted the influence of a city's center on its surrounding areas.
Area polarised by a centre, for a set of relations (influence area of a city) or a category of relations (area of cultural or commercial influence, trading area). The notion of influence is difficult to specify. It is measured on basis of frequencies (or probabilities) of travels made by inhabitants of the periphery toward the centre when using services it provides. Areas of influence (e.g. map drawn by G. Chabot in 1952 for the French cities) have almost circular shapes because probability of visiting a centre decreases in an exponential way with distance to the centre. Their limits are fuzzy because on the verges, population is divided among several competing centres.
The term "influence zone" has been widely applied to many other areas other than population centers. For instance hydrologists, electricians, architects and city planners often use the term to gauge the impact their projects and/or natural disasters might impact surrounding areas.
It was just a matter of time before Web-savvy individuals started using the same term to describe the effects of the Web on society.