Linking from your site to other websites should be done with caution
. Some of the page rank value will be lost for a given page with each off-site link. Sometimes it is important to link outside of the site in order to assist visitors. If the link required goes to a site that is very unrelated in content, a no follow tag should be added to the link thereby informing the search engines that this site is not vouching for the other site. This will prevent any loss of page rank value to the site.