ASK A QUESTION que tal? what does it mean and how to respond
que tal? what does it mean and how to respond
Like most salutations they can be either an actual query or a rhetorical question.
What more interesting than its use by itself is its use given in our dictionary:
¿qué tal…? -> how…?
¿qué tal (estás)? -> how's it going?, how are you doing?
¿qué tal el viaje? -> how was the journey?
see the first link for more examples of this usage.