Facebook can be a really great way to reach new people and collect signatures for your petition so it is worth taking the time to make sure links to your petition look good on Facebook. Think about the links that get your attention on Facebook, what is it about those that grab your attention? What about the image, headline or description grabbed your attention?
You can customise the way links to your petition look when they are shared in Facebook easily.
Go the the "Sharing Options" tab and then change the information in the Facebook box. Keep your description short and chose an image that will grab attention.