What section links are
Section links in Notes allow users to insert a hyperlink that leads directly to a specific heading or section within the same note. This is a feature that tools like Notion or Word documents have supported for years, and that was inexplicably missing from Apple's native app.
Practical impact
The feature is particularly useful for long, structured notes: personal guides, study notes, project documents. Until now, the only way to navigate quickly in a long note was manual scrolling. With iOS 27, users can create clickable internal indexes, making Notes more suited to complex document management. The feature is listed among the 263 changes in the closing slide of the keynote, as reported by iClarified.