Sock-puppeting: "To be is to be perceived."
I, we, they do this boosting, posting, tweeting, tooting, micro-blogging, blogging, vanity self-publishing to be perceived. A click, a "like," a "visitor to a web page" is a small indicator of having been perceived, thus having been, however insignificantly or insubstantially. These things make us ever so slightly less invisible.
Still, most systems exploit this drive for venal and draconian purposes: Corporate consumerism.