You've seen it when you've searched the web before: search engine results that are nothing but a long list of keywords. As it turns out, internet searchers look for concepts and context, not just keywords, when they search.
A study, based on eye-tracking technology, underscores this notion. People are looking for the best search result that meets their need, and to do that, they evaluate both keywords and their context, the concept that the combination forms.
If you're optimizing your site for keywords, then you might want to pay special attention to how your results are displayed and adjust accordingly. A long keyword list might not attract a customer as well as a well-formed page title and description.