The Get a URL action (v8+) downloads from a specified web location.
The results can be:
You can (v9.0+) include a parameter if desired. The Gear menu controls what characters of the parameter(s) are encoded. For Percent Encode Parameter Fields (the default), all characters other than = and & (and letters and digits) are percent encoded. For Percent Encode Parameter, all characters (other than letters and digits) are percent encoded.
If the output is going to a clipboard or a file, the downloaded data can be an image.