In the video "Fetching blogs in our homepage _ Portfolio Website + Blog Using Sanity.io #7," viewers learn how to fetch blogs and display them on the homepage of a portfolio website and blog built using Sanity.io. The tutorial covers the process of retrieving blog content stored in Sanity.io's backend and dynamically rendering it on the homepage of the Next.js application. Viewers can expect to gain insights into querying data from Sanity.io, structuring the layout of the homepage to accommodate blog posts, and implementing features such as pagination or filtering. By following along, viewers can enhance their understanding of integrating dynamic content into their web applications and creating a more engaging user experience for visitors to their portfolio website and blog.