Metadata is like a "digital ID card" for each PDF file; it contains core information about the document, such as the title, ...

This will return web pages that have links to PDF files, even if the pages themselves are not PDFs[2][3][5]. By using these operators effectively, you can significantly narrow down your search results ...

Like the GIF (that's Graphics Interchange Format), the PDF (Portable Document Format) has survived and flourished through the digital age. That's partly because of its versatility: It's the go-to ...