If you're wavering between choosing a specific audience over a broad one, consider your objective. If you're looking to drive traffic, you'll probably want to focus on the type of people you know will be interested in your offering. However, if you're looking to build brand awareness or promote a widely appealing offer, feel free to focus on a more general audience.
You also have the option to select a Custom Audience -- this allows you to target people on Facebook who are in your company's contact database, visited a page on your website that has a tracking pixel, or use your app or game. To learn more about how to set up a Custom Audience on Facebook, check out these instructions. (And for more on the specifics of these criteria, visit this Facebook targeting resource.) How to prepare and market using Facebook Ads