To monetize is to convert an asset into or establish something as money or legal tender. The term monetize has different meanings depending on the context. It can refer to methods utilized to generate profit, while it also can literally mean the conversion of an asset into money. For example, the U.S. Federal Reserve can monetize the nation's debt; this involves the process of purchasing debt (treasuries) which in turn increases the money supply. This essentially turns the debt into money (monetization).
Another example comes from websites monetizing their content. Many are set up to earn money through advertisers. When people who browse the particular site click on one of the advertisers' links, the owner of the website earns a small amount of money (this is known as pay-per-click, or PPC advertising). If the website attracts enough visitors, the small amount paid by the advertisers for each click can add up to substantial monetization.