Probably in every EPiServer project there will be a need to store a list of links to your content pages. EPiServer.CMS.UI 8.6.0 introduced a new multiple ContentReference property. Usually we could use a single property to store a collection of links. For example when building a media slideshow or when displaying links in a site footer. Using EPiServer there are several possibilities of implementation.
List properties: ContentArea, LinkItemCollection, multiple ContentReference
Read more here: Comparing list properties – Grzegorz Wiecheć