To edit your profile page, tap your name from the top of the app menu. You can set or change a photo from this screen by tapping on the circle with your initials and selecting the photo you'd like.
You can connect to different social media accounts by tapping on the Facebook, Twitter, or LinkedIn icon on the bottom of the screen (you'll see these only if this option in the app is enabled by your event organizer). If you connect your accounts, this will allow other attendees viewing your profile to also tap the icons to see your Facebook, Twitter, or LinkedIn page.
Tap 'Edit Profile' to change the name displayed, title and company. Tap the check mark in the top right to save any changes.