18. A system for facilitating display of advertising information to end users of a computerized data network, the computerized data network including a first server system, a second server system, and at least a first client system including, the data network further including, the system comprising: at least one processor; at least one network interface; memory; a plurality of software and hardware components including a first browser component and a first contextual analysis component; the system being operable to: receive, at the first browser component, web page content relating to a first web page; identify at least one first valid element of the first web page content suitable for contextual text search analysis, wherein the first valid element includes a first portion of the first web page content; extract text from the first identified valid element; provide the extracted text to the first contextual analysis component; perform, using at least one processor associated with the first contextual analysis component, contextual text search analysis on the extracted text, wherein the contextual text search analysis includes identifying a plurality of keywords in the extracted text; generate scoring information for at least one category based on the plurality of keywords identified in the extracted text; select at least a first text string that includes at least one of the plurality keywords, wherein the first text string corresponds to a first specific portion of text from the first web page to be displayed by the first browser component; automatically transform the first specific portion of text from the first web page into a link to at least one URL associated with at least one advertising system; and cause the first browser to display the link to the URL as part of the first web page.
18. A system for facilitating display of advertising information to end users of a computerized data network, the computerized data network including a first server system, a second server system, and at least a first client system including, the data network further including, the system comprising: at least one processor; at least one network interface; memory; a plurality of software and hardware components including a first browser component and a first contextual analysis component; the system being operable to: receive, at the first browser component, web page content relating to a first web page; identify at least one first valid element of the first web page content suitable for contextual text search analysis, wherein the first valid element includes a first portion of the first web page content; extract text from the first identified valid element; provide the extracted text to the first contextual analysis component; perform, using at least one processor associated with the first contextual analysis component, contextual text search analysis on the extracted text, wherein the contextual text search analysis includes identifying a plurality of keywords in the extracted text; generate scoring information for at least one category based on the plurality of keywords identified in the extracted text; select at least a first text string that includes at least one of the plurality keywords, wherein the first text string corresponds to a first specific portion of text from the first web page to be displayed by the first browser component; automatically transform the first specific portion of text from the first web page into a link to at least one URL associated with at least one advertising system; and cause the first browser to display the link to the URL as part of the first web page. 20. The system of claim 18 being further operable to: determine that the at least one first text string matches a first category associated with a first identified advertising campaign; select, using information relating to the first identified advertising campaign, advertising content to be displayed by the first browser component; and cause the first client system to automatically display a first pop-up window or layer which includes the selected advertising content, wherein at least a portion of the displayed advertising content is different from the first specific portion of text.