If enabled, Konqueror's Web Shortcuts feature lets you submit a query directly to a search engine or similar web site without having to visit the site first.
For example, entering
gg:konqueror
into the Location Bar and pressing Enter
will ask Google™ to search for items related to
Konqueror.
To see what Web Shortcuts are available, and perhaps add your own, use -> to open the Settings dialog box and click on the Web Shortcuts icon.