Using !bangs to search for pages on specific websites is easy. Simply go to the DuckDuckGo search engine and type an exclamation point, followed by a shortcode assigned to the website you wish to search. For Wikipedia, for example, you would type in “!w.” Follow this up with your search term.
Some other popular !bangs shortcodes are:
!yt (YouTube)
!gmail (Gmail)
!gm (Google Maps)
!a (Amazon)
!reddit (Reddit)
You can submit your own !bangs shortcodes to DuckDuckGo for websites that might be missing from the list.