Hi Jo
You can use Google Analytics and site verification, but you don't need to. It saves time and work on setup if you don't use them.
You can use Adsense Channels, they work fine for both content and search. It is the easiest way to go. It will tell you how many views and how many clicks for each site which has had a view and/or a click that day, and has other reports as well. Not as much detail as Analytics, but not as much work to set up either.