The libraries are available so that users can organise their components into several groups, making it easier to manage when building a system. To create and manage your libraries, go to the Library Browser located on the left navbar. You can filter your view by public or private ones, and watch the components inside a library just by clicking it.
You can create new libraries by clicking the Create Library button. Furthermore, each library has buttons for rename and remove them.
In order to add components to a library, first you must select a library and then go to the right-panel to add the components by clicking the '+' button on each one.
Finally, libraries can be made public to share them with everyone. To do this, simply click on the switch to set the current status.
In a public library, just the public components will be shown. If you include any of your private components, you will be the only one seeing them.