Clustering

In search engine result pages, clustering is the grouping of multiple web pages from the same web site into one or two listings in order to improve search result by preventing a particular web site to dominate the search result. This also makes the list of results clearer and more useful to the user, while providing the user an option to explore a particular web site in greater detail. For instance, with Google, you can click on the “More results from www.yourdomain.com” to see all the results in the cluster.