How can segmentation reduce complaint rates?

By not annoying people who don't want what you're sending.

Complaints happen when someone feels pestered. They signed up for occasional updates and you're emailing daily. They bought once and now receive promotions for products they'd never want. They're interested in one category but you're blasting everything.

Segmentation lets you respect those differences. Send promotional content to people who engage with promotions. Send educational content to those who click on articles. Match frequency to demonstrated interest.

The complaint threshold that matters most is 0.1% for Gmail and 0.3% for most other providers. Go above that consistently, and your reputation suffers. Segmentation keeps you below by ensuring each person receives content they actually signed up for.

The unsubscribe link exists for a reason. But many people don't bother to find it. They just click \"spam\" because it's faster. Segmentation reduces that impulse by making your emails feel less like noise and more like value.