It’s great to optimize your pdf content for SEO, but what about PDF meta information? We are evaluating what meta information needs to be maintained for best PDF SEO performance with the attached document.
For this case study, we uploaded this pdf with unique tags in the Filename, Author, Description, Subject, Creator, About, and Producer meta tags.
PDF File Used: Rehmann-SEO-for-PDFs-BASIC9890
After the PDF file was indexed by Google, we searched for these unique tags. The only unique tag found was the filename tag.
From this small study, we conclude the only PDF tags looked at by Google are the Title tag and filename.