Providing different URLs for every web search result page will give users the possibility to copy and paste the link. That means that they can make a search and easily send the results to another person.

Taking care of usability issues improves the user experience and could increase your sales. This is a good example. Imagine customers sending search results to their friends or partner to discuss about the next thing to buy. Make users’ life easier and you will win too.

Amazon is again an example of good web design. The URL has an estrange code for internal use but it was a smart decision to add the search terms to it (e.g. art + deco), so users can remember what was that link about.