Your "Landing Page" allows potential participants to gain insights on the event and also register for this event (registration dashboard must be open).
Under "Landing Page Controls" you will be able to manage the information you share with participants over time. This can help you highlight certain parts of the event "exhibitors", "speakers", "schedule", etc.
For example, while your final exhibitor list might not be complete you can decide to make the list of speakers public to create some hype around the event.
If you want to preview your current settings you can "Save information" and click on "Preview Landing Page".
Once you are confident in your current Setup you can publish the Landing Page by clicking on the red "Publish" button and confirming your selection.