Playwright's test fixtures provide a powerful feature for sharing setup and teardown logic across tests, promoting code reuse and maintainability. To use fixtures in Playwright, developers can create custom fixtures by extending the test object, which encapsulates setup and teardown logic, making tests cleaner and reducing redundancy. In contrast, Puppeteer does not offer native fixture support, requiring developers to implement their own fixture-like functionality, which can lead to more boilerplate code and a higher chance of inconsistency across tests. By choosing Playwright for its built-in support for fixtures, developers can streamline test setup and teardown, fostering code reuse and maintainability.