We will be offering a downloadable PDF guide to our visitors. For them to download that file, they will first enter their name and email address, but instead of clicking a SUBMIT button, they will click a DOWNLOAD button. After clicking the DOWNLOAD button, their information will be submitted to Shopify’s backend and they will then be prompted to download the file.
I uploaded my pdf to Google Drive, created a download link from the shared file link using Google Site’s functionality , and added the file download link (different from the actual Google Drive file link) to my email popup from the free EcomSend Popups app which allows to create a popup that opens a URL (in this case the link to the file download) after customers input their email.