The site uses Google Analytics to count visits. When a page loads, Google's script records the page you viewed and when, your browser and device type, the site that sent you here, and a rough location derived from your IP address, which Google truncates before storing. It sets first-party cookies (_ga and _ga_…) so returning visitors aren't counted as new ones; they last up to two years.

Google processes this data under Google's privacy policy. What Google does with data from sites like this one is described at policies.google.com/technologies/partner-sites.

• Install Google's Analytics opt-out add-on.
• Or block googletagmanager.com with a content blocker.
• Or clear your cookies whenever you like.

The site works exactly the same either way.

Questions about any of this: tyxiong2@illinois.edu.