How can I share pictures so that my guests can download the images?

Yes, actually you can. One simple way to do that is to collect your image folders or individual files on a shareable, cloud storage platform like Google Drive, Dropbox, OneDrive, or something similar.

When you add a description to your picture, include a link to that picture in the description. Any valid link (or URL) you enter in a description will be auto-linked (regardless of whether you include the protocol designation "https://"). You can add this at the image level or at the album level.

Since Ponga automatically converts the file name to the title of your picture, you have a handy mapping between the original file names and your Ponga picture names. If that mapping is important to you, be sure to make note of the original file name in the description too. This is useful if you're pointing to a cloud folder.