This is real-time surveillance of website visitors & search terms to websites that governments don't like. I'm guessing it wouldn't take much for them to correlate those visitors to IP addresses, cookies, device IDs and cell tower signals to pinpoint people in real time too?
Knock knock
Who is it?
It's the police. We know you're browsing Wikileaks right now.
Edit: Looks like GCHQ's "ANTICRISIS GIRL" [0], the tool used to monitor Wikileaks visitors in real time, was based on Piwik [1]
[0] https://prod01-cdn01.cdn.firstlook.org/wp-uploads/2014/02/pi...