From the Web facet page:
or 
in the Web Resource Directories section.
| Item | Description |
|---|---|
| Web resource directory path | The path to a directory that contains your web app resources such as web pages, images, etc. |
| Relative path in deployment directory |
The location of the web resource directory in the corresponding artifact.
/ in this field corresponds to the root of the Web facet resources element in an artifact configuration. |