i looked through the ClickStream data feed column reference, but couldn't find detail explanations on this. I seem to see multiple campaign IDs in one hit in our ClickStream data but I am not sure. Thank you!
checkout the event look up here
in your clickstream data column called 'page_event value'
70 - Indicates a hit that includes Target Activity data. This is 70 for hits that are and are not associated with an Analytics call.