How do I automatically add subscribers to my store?
When a new subscriber signs up they are automatically synced to your Shopify customers database. You may then target them using email tools which integrate directly with Shopify depending on their desire to accept marketing campaigns or not.
Initially, a subscriber will be added as an unverified email address, and upon confirming they will then be updated to a confirmed subscriber who accepts marketing.
If a subscriber clicks the unsubscribe link on the bottom of emails they will then have their accepts marketing flag disabled to comply with their wishes.