All about: Contact List CSV (MetaMatch)

Use this option if you have a specific list of Emails to target.

Please note, for Contact List CSV audiences, email is the only parameter we upload to LinkedIn and Facebook to ensure the best targeting.

You may see a higher match rate uploading directly to LinkedIn. This channel allows users to upload multiple parameters (e.g., first name, last name, email etc), which may lead to some inaccuracies.