Documentation

Hyperlink Length

If your Tooltip Fields contain URLs, you can limit the maximum hyperlink length. This setting can be used to avoid scenarios where lengthy hyperlinks may cause usability or appearance issues. 

Enter the maximum permitted character count for hyperlinks (default setting: 25 characters). All hyperlinks that exceed this value will be truncated with an ellipsis (…).
0: Default setting will be used (25 characters).
5: zoomc...
10: zoomcharts…
25: zoomcharts.com/en/micros…
50: zoomcharts.com/en/microsoft-power-bi-custom-visual…