Live sessions are exactly what they sound like: they're live and in real-time! They occur at a pre-scheduled date and time, so make sure to arrive on time (or even early). You can add live sessions to your calendar to make sure you don't forget about them. Once you've joined, you’ll have a number of ways to interact with the speaker and other attendees via chat, Q&As, and more.
On-demand sessions are pre-recorded sessions that are available at any time, on-demand. Often, live sessions are recorded and made available as on-demand sessions several days or weeks after the live session took place (and can be accessed until the event site is disabled, typically several months after the event ends).
Check out your Agenda by clicking the calendar icon in the top navigation bar to see which sessions you've added to your schedule are live or on-demand.