iCM holds all of your external links in a library so that you can easily update them in one place. When a link is updated, that change will be passed through to all of the articles and media items that use the link.
iCM also includes an external link checker that will test your links and warn you if any are broken or redirected.
Like other content items, iCM organises links into groups. Access to the link library and its groups is granted to users via their iCM Privileges.