Sentence:  The dirty secret of the <WSD>internet</WSD> is that all this distraction and interruption is immensely profitable. Web companies like to boast about "creating compelling content", or offering services that let you "stay up to date with what your friends are doing", "share the things you love with the world" and so on. 
Meaning of the word marked with <WSD> tags:  The Internet, the largest global internet.