What are the PluginGroup types that I can use when developing a Joomla plugin?

Question

When developing a plugin, what are the PluginGroup types that I can use in Joomla? For example, if you were to create a search plugin the <PluginGroup> would be Search.

I've tried to find a list of the types currently in use in Joomla, but so far no luck. Another related question: Is it possible to create your own plugin group name?

My question was inspired by this tutorial https://docs.joomla.org/J3.x:Creating_a_Plugin_for_Joomla It recommends using the PluginGroup to create a classname for the plugin like so

    class plg<PluginGroup><PluginName> extends JPlugin
{
}

Answer 1

Certain PluginGroup types receive specific events. Mainly system group is very important in the initialization and page rendering process. Additionally, user and authentication plugins have a key role.

Finally, you can also create your own group and manage your own set of plugin events for your extension.

Check the list of events, by group here: Plugin/Events - Joomla! Documentation.