Session data from your site is captured by Noibu's collect.js script. The script captures everything a user does in a session, processes that data, and sends it to Noibu's databases.
In some instances we may not be able to capture a user's sessions. Some ad-blocking plugins or pop-up blockers can delete the Noibu script from the user's browser. If the script is disabled or unavailable, Noibu cannot track the user's sessions and retrieve session data.