DV automatically determines if an advertisement operation is needed and if this should be an add, update or remove operation. For example, when an object is first selected for a site, this results in an add operation. And when a property of an object is changed and the object is already advertised, an update operation will be scheduled.
In some circumstances it is desirable to have an advertisement to be reposted: remove the existing advertisement and place (add) a new one. This can be triggered by first deselecting the object for the site (resulting in a remove operation) and then reselecting the object for the site (resulting in an add operation). However, if these steps are done in quick succession DV might simplify both operations and just schedule an update operation instead. It is therefore possible to explicitly state (using the API) to have a repost operation be performed.