1. A method for facilitating display of advertising information to end users of a computerized data network, the computerized data network including a plurality of software and hardware components, including a first browser component and a first contextual analysis component, the method comprising: receiving, at the first browser component, web page content relating to a first web page; identifying 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; extracting text from the first identified valid element; providing the extracted text to the first contextual analysis component; performing, 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; generating scoring information for at least one category based on the plurality of keywords identified in the extracted text; selecting 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 transforming 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 causing the first browser to display the link to the URL as part of the first web page.
6. The method of claim 1 further comprising: generating, using the at least one identified keyword, first web page scoring information which includes at least one first score representative of a contextual relevance of the first web page to at least one category and/or topic; selecting, using at least a portion of the scoring information, advertising content to be displayed at a first client system; and causing 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.