When a question is raised about GitHub Pages not updating, it typically suggests there might be issues related to how the site is set up or the process by which changes are being committed and deployed. Here are some common areas to investigate and potential solutions:
Branch Settings: Ensure that your GitHub Pages are being deployed from the correct branch. By default, it might be set to ‘gh-pages’, but this can differ if you’ve configured it to deploy from another branch, such as ‘main’ or ‘master’. Check the “Pages” settings in your repository to confirm this.
Commit Status: Check that you have committed and pushed all your changes to the branch designated for GitHub Pages. Sometimes, local changes may not have been pushed to the remote repository.
Build Errors: GitHub Pages uses Jekyll by default unless configured otherwise. If you’re using a Jekyll site or any other static site generator, ensure there are no build errors in your site configuration files (such as _config.yml). You can see build errors by checking the GitHub repository’s Actions tab for any workflow logs associated with Pages.
Cache Issues: Sometimes, changes may not appear due to caching. Clear your browser cache or try accessing the site in a private browsing window to see if the updates appear.
Custom Domain Configuration: If you’re using a custom domain, verify that the domain is correctly set up with your DNS records pointing to GitHub’s servers. Also, make sure your domain settings are correctly applied in the repository’s Pages settings.
DNS Propagation: If changes are being made to a custom domain, DNS updates might take some time to propagate.
Static File Changes: If your site relies on static files that use query parameters for cache busting or direct references (like .CSS or .js files), updating the file names or cache parameters may be necessary.

Each of these factors can contribute to why updates appear not to be reflected on GitHub Pages, and addressing these should help ensure your site updates correctly.