These advertisers are running ads using a contact list they or their partner uploaded that includes info about you. This info was collected by the advertiser or their partner. Typically this information is your email address or phone number.
I like how they purposely give a couple examples, omitting the targeting factors that are more likely to freak people out, such as targeting by lists of names and dates of birth
I like how they purposely give a couple examples, omitting the targeting factors that are more likely to freak people out, such as targeting by lists of names and dates of birth