Mainframe is a network that allows different applications to share information with each other securely, without censorship or surveillance. It's like a messaging platform for the new internet. It's really hard to stop, except if there's a catastrophic event like an asteroid hitting us or aliens attacking us. Developers can use it to build different apps and services that work well together. The platform is designed to be flexible, so developers can use the parts they like best. This helps everyone work better together. Developers can use Mainframe tokens to make things even easier.