As you browse various sites across the asu.edu web, your browser collects various cookies from the sites. If your browsing session accumulates too many asu.edu-scoped cookies that cause the total web request size to get too large, you may start to experience issues on various websites, with errors like "Bad request" or "Request Header Fields Too Large". This can often be resolved by manually deleting your cookies in your browser, but that can have negative consequences like getting logged out or losing saved preferences.
This page attempts to detect a "too much cookie data" scenario and attempts to delete some asu.edu cookies in order to remedy the problem.
If it worked, you should be all good now!