Let's say I'm searching for 'tires' in Google. I get my results and click on one of the links. It has a script or something(?) in it that says something like "Hey Google user! You searched for tires...Here's what we have in stock:"

Where can I find a script or plugin that would reference searches and keywords like that on a landing page? Since I don't know exactly what it's called, I'm having trouble finding it, but i know it's out there.....