Our Subscriber Engagement tracking code allows you to send user status data to Chartbeat so a visitor to your site can be tracked under one of three categories: Guest user, Registered user, or Subscribed user. Once implemented on your site, a new module appears in your Real-time dashboard:
The 'Unspecified' visitor category represents concurrent users where a valid subscriber value (‘guest’, ‘subscriber’, ‘registered’) was not received by our tracking script via your implementation of our subscriber tracking code on your website. This offering is not yet supported within our AMP and Facebook Instant Article tracking integrations, so it's expected for some portion of your traffic to be included within this category if you make use of those integrations.