Next js has a comprehensive list of features that include hot code reloading and splitting, automatic routing, prefetching, typescript support but one feature you should be most excited about is the support for Headless CMS.
Headless CMS is a backend Content Management System that does not worry about how and where your content gets displayed rather a headless CMS focuses on only two things: storing your structured content and delivering it. Next js integrates smoothly with any of the headless CMS providers you choose. For example, this page uses Prismic but you have an option to select from a wide variety of CMS providers like Contentful, StoryBlok, Strapi to name a few.
Absolutely No, you just need an awesome Next js developer like me to set up and integrate your preferred Headless CMS for the first time. Post setting up you can simply log in to CMS provider's dashboard and publish as many blog posts and incredible content you want on the website.