The difference between the "Share Links" options "Page short URL" and "Image short URL" is

The first option shares data by downloading the entire data series to a spreadsheet and the second option downloads an image of the graph.

The first option shares data by linking to the entire data series page and the second option links to just the image of the graph.

The first option embeds the entire data series page into a social media platform and the second option only embeds the image of the graph.

The first option sends an email with the entire data series and the second option sends an email with just the image of the graph.