The Twilio Netbook Contest is a bi-weekly developer contest that encourages developers to try Twilio for different use cases and industries, with the goal of solving problems and finding success with the platform. To participate, developers can resubmit their previous projects related to health and fitness if they were not previously winners, or submit new ones. The contest aims to support developers from all backgrounds in using Twilio for cloud communications, providing them with resources such as API reference documentation, SDKs, sample apps, and industry reports.