How would you set up an email preference centre, and why does it matter?

The preference centre is built on public lists — each list you want prospects to be able to choose is marked public with a clear, customer-facing name and description. The centre is then reachable from the unsubscribe link in emails, and prospects manage their own subscriptions there.

Design matters as much as configuration. Categories should reflect what the recipient wants (product updates, events, monthly newsletter) rather than internal team structure. A frequency option is worth including, because 'too often' is a more common complaint than 'not relevant'. The full opt-out must remain present and obvious — hiding it is both a compliance risk and counterproductive.

It matters because the alternative to a granular choice is a binary one, and people who only wanted the newsletter will take the exit. It also protects deliverability: someone who cannot easily unsubscribe will often mark the message as spam instead, which does far more damage.