When there is a lot of information available, it is easy to fill a screen with so much information that it confuses more than that it informs. At the same time information is there to be shared and not making it available is not an option either.
"Reasonator" brings us pop up windows that provide all that extra information. It will direct you to Commons, to Wikisource, to Wikivoyage and Wikipedia when applicable. There is another neat trick; when an item is "red lined", it will urge you to add a label in Wikidata.