We ask that you make your presentation materials available to conference attendees. You can do this at any point but our expectation is soon after your session is done. No need to add ahead of time if you would prefer not to.
You can do this by using the top section of the Collaboration Notes for your session. There you will see a section where you can link to your materials. This can be linked to a dropbox file, slideshare deck, etc.
Please ensure it is free and easily accessed by participants and not used as a lead generation effort by users hitting a form to download, etc.