After you successfully inserted the plugin, you can now work on its settings. The tab "Content Selections" offers multiple possibilities.
Example: You want to include the publications of the group "testgroup". Therefore, choose "group" as content source and insert the id "testgroup".
Now you can filter your selection by using the tags. To select just your own publications, choose the tag "myown". If you want to select more than one tag, you have to separate them by a space character. Optionally, you can limit the number of publications or filter with free text.
There is also the possibility to filter the content by using the fulltext search field.