The POST HTTP Request submits data to be processed to the identified resource. The data is included in the body of the request. This may result in the creation of a new resource or the update of an existing resource, or both. 

Generally this is used for sending messages or updating data on the server. The Bulletin Messenger and Bulletin Connect APIs use this method to send messages. See the features of these products for more information. 

Also see: GET method for the other common HTTP Request.