RealmNameForgeNames and favorites
Generation and local checks run in your browser. When you choose Search Blizzard Armory, your two name parts are sent to Blizzard as the search query for the selected region. Favorites remain in this browser until you remove them or clear site data. CSV exports save to your device.
Usage measurement
When Google Analytics is configured, the site measures actions such as generating, checking, and exporting names. These events omit name inputs, results, and search text.