Search the Web for currently selected text using keyboard shortcuts (Ctrl+Shift+G -> Google, +B -> Bing, +Y -> Yandex, +W -> Wiki)
How often do you select text, copy it, and then open new browser tab to search?
"Copy and Search" helps you to do the same with selected text just by pressing a single keyboard combination!
Moreover, there are different keyboard combinations for different search providers
Ctrl+Shift+G -> Google
Ctrl+Shift+B -> Bing
Ctrl+Shift+Y -> Yandex
Ctrl+Shift+W -> Wiki
Cool isn't it? :)