Start here. This is the direct spoken answer to practice first.
Why this question matters
Release notes are not only paperwork. They help QA, Product, support, and operations understand what changed and what to watch.
Useful release notes explain what changed, why it matters, and whether there are risks or actions needed. For a backend release, I would include user-facing changes, API changes, migrations, configuration changes, known risks, and rollback notes if relevant. The goal is to help people understand the release without reading every commit.