Facebook targeted application - Ask for user email before or after social connect?

1. How does Facebook detailed targeting work?
2. How long does it take to get approved on Facebook?
3. Does Facebook require an email address?

How does Facebook detailed targeting work?

Detailed targeting is a targeting option available in the "Audience" section of ad set creation that allows you to refine the group of people we show your ads to. You can do this with information such as additional demographics, interests and behaviors. These detailed targeting options may be based on: Ads they click.

How long does it take to get approved on Facebook?

Once Facebook receives your application, they will review your request and either confirm or deny it. This process can take anywhere from 48 hours to 45 days.

Does Facebook require an email address?

Minimal Facebooking. To sign up for a Facebook account, you need a name and a working email address or mobile phone number. You can use any name you are known by. However, if you run into a problem, you may have to provide an acceptable form of ID to verify it later.