JavaScripts

Non compiled programs written in the JavaScript programming language which run on the Internet user's computer. If content is embedded in a JavaScript, it will be invisible to the search engines and will not get indexed.

Java applets

Small programs written in the Java programming language that can be embedded into web pages. Applet programs run on the Internet user's computer rather than the web server's computer. Search engines can not run Java applets. Consequently, if navigation or content is embedded in a Java applet, it will be invisible to the search engines and will not get indexed. Java source code gets compiled into executable code called "bytecode."

Jump Page Ad

A microsite reached by clicking a button or banner. The jump page itself can list several topics, which can link to your site.

Junk pages

meaningless documents that serve no purpose other than to spam the search engines with keyword stuffed pages in hopes a visitor might click on an adsense ad