Your email platform knows who has bought, who has lapsed and who keeps browsing. Synced to Meta, those segments decide who sees which ad, so you stop paying to reach people who just ordered and start finding more people like your best customers.
Klaviyo and Mailchimp can sync segments to Meta as custom audiences, and keep them updated as people move in and out. For other platforms I check what connects during the audit. Meta matches the addresses in a hashed form.
Your privacy notice should say customer data may be used this way. I check that as part of setup.
Want this looked at on your own account? The free audit covers your ads and your email, in writing, in five working days.
Get the free auditSee Meta Ads pricingWhen ads and email are run by different people, the same customer gets a 20% off ad and a full-price email in the same week. With one person on both, the segments, the offers and the timing match. That is the whole point of running them together.
Klaviyo and Mailchimp do directly. For others I check during the audit.
Yes, if your privacy notice tells customers their data may be used for advertising.
Yes, in every Meta Ads tier.