Starting in Chrome 85 (scheduled to go to stable in late August), Chrome will automatically generate a tagged PDF when you print a web page and choose the "Save as PDF" destination. A tagged PDF is one that contains extra metadata about the structure of a document, including things like headings, lists, tables, paragraphs, and image descriptions. Tagged PDFs are more accessible to users with disabilities, such as blind users who use a screen reader to access PDF files. Tagged PDFs can have other uses too, like making it easier for software that needs to automatically process and extract data from PDFs.
We think adding this metadata to PDFs is a perfect fit for Chrome, because that information is already available in well-structured, accessible web pages. We hope this helps make more content exported from Chrome to be accessible to even more users.