Holds message ID. Typically, each new message you put up
on the server will have higher ID value. That way you have
to store in your local app's settings last ID that was
shown to the end-user. When larger ID is found on the
sever, you will show the message and increase local stored
ID value.
wodAppUpdate doesn't use this information
internally. It's up to you to decide what to do about
it.
ID
Property
