Hello,

I don't know if we read the same document. What about this:

"The main difference between <a4j:push> and <a4j:poll> components is that <a4j:push> makes request
to minimal code only (not to JSF tree) in order to check the presence of messages in the queue. If a message
exists, a complete request will be performed. The component doesn't poll registered beans but registers
EventListener which receives messages about events."

In my words: push is something like a poll that only rerenders its components if something changed. But you're right, the documentation is short. Nice to have: a better example to use that.