For most people, finding the right website is only the beginning of the search process. But while navigating the web has gotten a whole lot better, picking one's way through a particular site can be slow going. That realization prompted Google to offer a secondary search function that allows users to find what they're looking for on a particular site through an additional search box.

While many sites incorporate a Google search box, Google's experimental secondary search product is aimed at keeping the primary and secondary search contained on its own results page.

So far, the secondary search function is available on only a handful of consumer sites. A query for Amazon, for example, will return a result for the main site. Below the first result, users can type additional keywords into a secondary box that allows them to get specific results only from Amazon.