Insert Your Facebook "Like Box"
Scroll down your "Viral Contest Landing Page" template. Find the grey box on the left side with the title "Like Us On Facebook".
Double click to bring up a script editor where you can edit the code.
Then visit the Facebook Developers page and use the code generator in the middle of the page to generate the code you'll need to paste into the Unbounce script editor (see settings below the image).
Step 1: Enter URL to your Facebook page
Step 2: width:350px
Step 3: color scheme: light
Step 4: connections:12
Step 5: show stream (uncheck)
Step 6: show header (uncheck)
Select the "iframe" script, then copy and paste this script into your Unbounce script editor