How do you add a PDF to a webpage?

If you are building a web page, post the PDF as you would any other file and link to it with an href tag like this: <a class="url" target="_blank" rel="nofollow noreferrer" href="/to/?target=file-name-here.pdf">Download Link</a>. Alternatively if you do not have access to upload PDFs to your website you can upload to sites like slideshare.net, or dropbox and link to them for download.