Probably how many people clicked on what url. There are probably some information about those, the more trivial would be from where in the world they are and how they got there (following a link, being redirected or having entered it manually)

More complicated stats would include estimated age, gender etc, if available

That looks cool

American police: they think they know what the law is.

If you have the need to nest 5 levels of for-loops, I suggest taking a step back and rethinking your approach, my friend.

Even if that other approach is just refactoring it into separate methods.