Use sb
as a search engine in your browser, and you can type things like
gi boat
to search for pictures of boats, yt rickroll
to search for videos etc.
You can add your own aliases, for example alias x http://xkcd.com
or alias ddgi https://duckduckgo.com/?q=%s&iax=images&ia=images
.
Use list
to see what commands are available.
Follow the installation instructions.