In this continuation of a series on building a blog with WordPress and Gatsby.js, the focus shifts to integrating data from WordPress into a Gatsby site and building pages programmatically. The author explains the initial setup using the Gatsby CLI, detailing the components of the default starter project, including various configuration files and plugins essential for development. Key Gatsby plugins such as gatsby-source-wordpress and gatsby-plugin-sitemap are introduced to facilitate content integration from WordPress. Emphasis is placed on understanding the gatsby-node.js file's role in creating dynamic pages from templates using GraphQL to query data. The tutorial guides users through setting up templates and utilizing GraphQL queries within components, while highlighting the importance of components for maintaining consistent layouts and enhancing SEO. By the end, readers are equipped to automatically generate pages for each WordPress blog post, marking significant progress in the Gatsby.js build process.