This document discusses ambush marketing, which is a promotional tactic used by companies to associate themselves with major events without being official sponsors. It involves raising brand awareness through indirect sponsorships of related media or teams. Examples are given of ambush marketing at the Olympics and World Cup through sponsoring broadcasts, teams, or running advertisements. The strategies aim to tap into the large media audiences of events. While it raises ethical questions of undermining official sponsors, some see it as a virtual necessity in competitive business.