Does anyone know how I could track what search terms people are using to arrive at my site. For instance, someone searchs google for 'giant inflatable house' and clicks through to my site. I want to be able to capture those keywords and which search engine they came from.
You must parse the referer. For exemple a google search query will contains: http://www.google.be/search?q=oostende+taxi&ie=UTF-8&oe=UTF-8&hl=en&client=safari
It's a real life query, yes I'm in Oostebde right now :)
See the query string. You can determine pretty easily what I was looking for.
Not all search engines are seo friendly, must major players are.
How to get the referer ? It depends on the script language you use.