Used in Google, the double quotes have no additional features.
It is for this reason that some Google search trainers now speak of the double quotes as exact search operators rather than as just for phrase searching.
Embase supports either single or double quotes for phrases.
While double quotes designate phrase searches in both the legacy and the new platform, how ProQuest interprets multiple-word queries without quotes has changed.
Phrase searching with double quotes typically gets around such differences and tries for an exact match of the phrase, but EBSCOhost does not search stop words even within quotation marks.