The document discusses the challenges of building single page applications (SPAs) for search engine optimization (SEO) and outlines how Nuxt.js provides a solution. SPAs are not inherently SEO friendly as search engines cannot execute JavaScript code to render pages. The only solution is building a universal or isomorphic app that can run on both the client and server. While universal apps improve SEO, development is complex. Nuxt.js simplifies this process by providing a framework for easily building universal Vue.js apps with features like automatic routing, data fetching, pre-rendering, and SEO optimizations out of the box.