The document discusses building web applications using WordPress. It outlines features of web apps like offering services and safekeeping personal data. It describes building a WordPress web app framework with plugins, APIs, custom post types and fields. The framework includes features like a module-based app engine, public APIs, custom roles and workflows. It also discusses authentication for remote app requests and responses with serialized API data. Building web apps in WordPress allows leveraging its existing plugins and APIs while separating content from presentation.