A domain parking service allows domain owners to earn revenues without needing to develop any content on their websites. See domain parking for more details about the domain parking business model.
Some domain parking services are free for quality domains and others make no selection but have a minimum fee.
Domain parking services offers commonly a range of templates, logos, images and themes to create a presentable landing page. Some top notch services offer automatic optimization which makes layout and image choices based on click and revenue tests.
For optimizing parking revenue domain parking services allow users to choose which keywords will trigger ads from the partner PPC platform. For more details on the subject see domain parking keyword.
Top level domain parking solutions also offer tools and features to professional domainer for managing big domain portfolios.
A commercial video demo of parking optimization and statistics:
Another demo showing how to register a domain name on a domain parking service: