If you want to share a PDF or other type of document on your website so anyone can download follow these steps
Upload the file from the Content menu under the "Files" page.
After a successful upload edit the document record and set the "Allow public access" flag.
Copy the link from the document in the list to the clipboard.
Now create or edit the page you want your visitors to be able to download the file from. Using the new page builder use one of the templates (the "call to action" templates are ideal) and add the link to a button by using the "Edit Link" option. You can also just use a simple link.
When you paste in the link you can remove the full domain name just leaving the "relative path" to the file
e.g https://yourwebsite.com/Platform/MembershipFiles/Download/080096cb-c6f4-47f0-97df-8a9b3bc3dd3c can just become /Platform/MembershipFiles/Download/080096cb-c6f4-47f0-97df-8a9b3bc3dd3c
Using a relative path to your files/pages means that if you ever change your domain name all your website links will still work.