What to share?
In the repository, you can share collections. Collection is defined as a set of resources that belongs together i.e can be used to create a coherent map design or to do a specific task.
The items that you can share on the repository are:
|Images||SVG files or other image files that can be used for svg marker or raster fill|
|Symbols||In the form of XML that could contain marker, line, fill, or colorramp|
|Styles||In the form of QML file|
|Processing scripts||Python processing scripts|
Note that you can actually put other QGIS resources in the repository (composer templates or project files), but for now they will be ignored in a way that the plugin will not do anything to them (e.g installing the resources).