On a Computer:

 

Step 1. 

Go into your confirmation email and select "Access your tickets"

 

Step 2. 

Select "Download all tickets"

This will download a PDF that contains your tickets. 

 

On a Phone:

 

Step 1. 

Go into your confirmation email and select "Access your tickets"

 

Step 2. 

Select "View Ticket" 

This will bring up a QR code that can be scanned for entry into the event