From the main event page, select the "Exhibitors" tab. Note that the event organizer may have named this section something other than "Exhibitors".
Select the Exhibitor you'd like to view to see their profile.
You can elect to share your contact information with them using the "Connect" button, which will start a chat conversation in the Community with you and that exhibitor. Additionally, they might have added additional content for you to be able to review in tabs titled "Photos", "Videos", etc.