The Email node is particularly useful because you can configure it to include unique information collected from individual callers. To do this, you can insert in the body of the email a dollar sign ($) followed by the name of the node that collected the information.
For example, you might want to use the Email node when callers leave voicemails via the Rec Audio node. If so, you can place an Email node after a Rec Audio node and then use the Email node to send a link to the WAV file created by the Rec Audio node. Simply enter a dollar sign ($) followed by the name of the Rec Audio node — that is, the Node Id — in the Body Content field.
You might also build an IVR that uses the Get Input node to collect some information like zip codes or account numbers from callers. If you do this and want the information to appear in your emails, enter a dollar sign ($) followed by the Get Input node ID in the Body Content field.