Where the agenda sits on the page
Under the title and the short description, above the register button, and never collapsed behind a link. People scroll to it the way a person scrolls to a train timetable: quickly, looking for one number.
The agenda also carries the audience line, which the product does not render as a separate block. So if you want to signal who the session suits, write it into a chapter title or the description: "the three cases a small firm meets most often" tells an accountant that this hour is theirs without a heading about target audience.
Finally, a label. A session is either a webinar or a workshop here, and the agenda is what makes that choice believable: a workshop with no hands-on chapter is a webinar wearing a different name.