Final answer:
Smart list qualifications and segmentation changes are often not visible in a lead's activity log, contrary to webpage and email activities which are typically tracked.
Step-by-step explanation:
The types of activities that are typically NOT visible in the lead's activity log in most marketing automation platforms are A. Smart list qualification and B. Segmentation changes.
These activities relate to the internal process of sorting and managing leads as opposed to direct interactions or behaviors like viewing web pages or engaging with emails, which are C. Web page activity and D. Email activity, and are usually tracked in the activity log.