See “Backlinks”.

Web page towards which clocks in no link since another page. The only way to access an orphan page is therefore to know her URL.

Homepage of a Website including an only link hypertext by which the visitor accesses a new page, she allows to achieve the rest of the pages of the site. This page, often made up of a look and a message of welcome, brings nothing, either to the visitors, or to robots. It causes an access in "funnel" to the site as well as a lengthening of the course-visitor of an additional click, what can be source of penalty of all the pages of the site by research motors.

Indication of popularity of a Web page going from 0 to 10, calculated to a very sophisticated algorithm worked out by Google, it appears on the toolbar Google. It is linked in number and in the quality of the backlinks of a Web page: the more the Web page includes backlinks with high PageRank ™ and with a close topic to his, the more PageRank ™ of the Web page will be in its well brought up turn and better what will be the popularity of this page, will with a positive impact on the positioning of this last by Google.

Number of data entries of one (couple of) keywords(s) by the internauts on research motors: the more the number of data entries is well brought up, the more positioning is appropriate.

See “PageRank (PR)”.

Way a research tool classifies the pages of results of its index in order of pertinence for one (couple of) keywords (s) given. The most appropriate sites appear in first on the page of results during a specific request. There are 2 kinds of positioning: natural positioning and advertising positioning.

Positioning of a Web page emanating from a counting performed by the algorithm of pertinence of the research tool, and not on the basis of paid performance. This positioning was acquired, most often, by optimization of the html code of the Web page according to criteria of pertinence of the research motor.

See “Advertising Positioning”.

Fact to buy his rank to research motors: the link so put at the head of the results of motors is said sponsored. ,
It is possible to be situated in the very first places of Yahoo! by buying her position to Overture, the sales positioning service of Yahoo! newly reappointed Yahoo Search Marketing. ,
Google, via his commercial program AdWords, gives a visibility to the affiliated members in a frame devoted to the commercial links, often put above or on the side of the page of results of researches performed by the internauts, about which positioning is said natural. ,
Commercial links are mostly pointed out and often invoice to the « expense by click » (the affiliated member pays only when link is clicked by an internaut).