Final answer:
A session in tracking code context is a period of user interaction on a website when the HubSpot tracking code loads.
Step-by-step explanation:
A session in the context of tracking code refers to a period of time during which a user interacts with a website. When the HubSpot tracking code loads on a website, it starts a session. The tracking code collects data about the user's interactions, such as page views and form submissions, which are then used for analysis and marketing purposes.
Thus a session in tracking code context is a period of user interaction on a website when the HubSpot tracking code loads.