Hashim Warren's article introduces Challenge 5 of the #100DaysOfGatsby event, which encourages participants to integrate React components into Markdown-based blog posts using MDX, a format that allows for interactive and styled elements beyond static text. This challenge is part of a larger initiative to help individuals learn about Gatsby, a highly recommended technology for 2020. Participants, whether beginners or those more experienced with Gatsby, are provided with resources like Gatsby’s MDX tutorial and other community support options, including forums and social media platforms, to assist them in completing the challenge. Warren, a full-stack marketer, emphasizes the ease with which writers can contribute content without needing to edit HTML or JSX directly, while also highlighting advanced MDX features like "shortcodes" and the use of community plugins like gatsby-mdx-embed.