Your ad for Facebook should be different from ads on other platforms. Even if you’re also advertising on other social media sites, your Facebook ad has to be unique, as would an ad for Twitter or Tumblr. That’s because you need to consider not only who is going to encounter this ad, but where they will see it and what mindset they’ll be in when they do. That seems like a lot but it is the key to crafting the ideal ad.
Robin Bresnark has an article at Business2Community that delves into this idea of incredibly specific audience targeting. Although I disagree with some of his finer points, everyone should agree on the core of the article, which is simply to think of who you are selling to before creating your selling tool.
The prevailing thought is ‘Facebook isn’t for selling’ so you’ll need to take a different route. Once you figure out what exactly works for Facebook, you can start trying to work within those parameters to find what works for your key demographic.