Sitemap File More Info: http://www.sitemaps.org/ Note: Best way to inform search engines about your sitemap file is to include it in your robots.txt file.
Canonicalization Fancy ComSci term popularized by Google 12345678910
Canonicalization These are completely different URLs: ups.com/contact www.ups.com/contact ups.com/contact/index.html Rule of thumb: Ignoring anything after a ?, each page should be reachable by just one URL.
Firebug & YSlow Install Firebug: http://getfirebug.com/ Install YSlow: http://developer.yahoo.com/yslow/ NB: Firebug and YSlow add-ons are made for Firefox. IE, Opera, and Safari support can be replicated using Firebug Lite.
Multiple CSS, JS, Icons Carpooling for files 12345678910
robots.txt House Rules for Search Engines 12345678910
robots.txt SHAMEFUL Dont index anything: http://jcp.com/robots.txt http://www.sears.com/robots.txt SHADY Dont let anyone see I that changed my policies: http://vonage.com/robots.txt SOLID Index almost everything (and grab my sitemap while youre here): http://www.llbean.com/robots.txt