For advanced Facebook lead ads campaigns, it's often essential to create tens or hundreds of lead forms. For example, deploying local lead generation campaigns, or running multiple campaigns over multiple Facebook Pages.
To convert leads from Facebook lead ads, it’s essential they are delivered quickly, securely and in the right format to your CRM or ESP. An MIT study showed that responding within the first 5 minutes increased lead conversion by 9X.
Below is the formatting for Facebook lead form field id's.