Jetpack's built-in visitor analytics. It records page views, referring sites, search terms, and outbound link clicks, and also carries the shared visitor-tracking library used by Jetpack Instant Search.
Service URL: automattic.com (opens in a new window)
tk_ai_explat
Random, pseudonymous visitor ID set by Jetpack Stats (Automattic) on wordpress.com, together with tk_ai. Not used for advertising.
About 13 months
tk_ai
Stores a randomly-generated anonymous visitor ID so Jetpack's Tracks analytics library can link tracking events to the same visitor.
about 13 months
