Adding pages to a PDF can be quite useful for combining documents or adding extra content. You can use tools like Adobe Acrobat, where you open the PDF, click on "Organize Pages," and then "Insert" to add new pages. There are also free online tools like PDF24 or Smallpdf that can do this. Have you tried any specific software or online services for PDFs? I'd love to know what you're working on or if you need help with a particular tool!