You can participate in sessions by sharing a reaction, asking questions, and engaging in the chat.
To share a reaction, click one of the icons that appears on the right side of the session player.
To participate in session chat and moderated Q&A, click the message icon in the top right corner of the session player to reveal the chat sidebar. The sidebar has two tabs: Chat and Moderated Q&A. If you want to ask the session speaker a question directly, enter it in the Moderated Q&A tab.
Your question will first appear in the My Questions tab. It won't be visible to the rest of the session attendees until/if the moderator publishes it. If a moderator or speaker publishes your question, it will appear in the Featured tab, in addition to the My Questions tab, where the moderator, speaker, or any other session attendees can respond to it. Instead of publishing your question, a moderator may choose to keep it unpublished and send you a private reply instead.