GitHub Wiki is a very useful feature. The built-in documentation hosting service lets you create and manage a knowledge base for your repository. You can edit pages directly in your browser using Markdown, but that only works well when you’re fixing a typo or making small changes. Once the documentation gets even slightly serious, the browser editor becomes too basic to use productively. A better option here is VS Code. It gives you a proper Markdown preview while writing, along with shortcuts, formatting helpers, linting, and extensions that catch mistakes or structural issues. If you’re writing long docs, guides, or anything structured, this alone can save you a lot of time.