What can i do with Facebook emails ?

Hey guys,

I scraped my niche targeted users facebook emails via faceids but how can i send to them friend request ?

Well the best method is to use the Facebook emails to create a custom audience. You could also invite them to like your Facebook page but that would also send them an email and in the email it says "you shared your email with this user". Would probably get flagged pretty quick if you did that.

"Well the best method is to use the Facebook emails to create a custom audience."
Can you elaborate on this?