Crosslinking also serve a worthwhile objective in the form of search engine optimization. Link popularity is one of the main factors involved in how search engines determine the value, importance and relevance of sites on a given topic. This calculation is reflected in the ranking of site search.

Cross Linking sites together means that you put a link on your site B. These sites may be owned by the same person, or only related sites wishing to connect to each other. Cross-linking is designed to help users by showing them to other sites that might interest them or which may give them additional information about a particular subject area. Unfortunately, many cross-link to blow your PageRank is Google's algorithm quickly forget what the cross-linking is really meant to be used.