Ambush marketing is a promotion tactic used by companies to associate themselves with major events like the Olympics or World Cup without being an official sponsor. Companies do this through advertising and promotions around the event in order to gain attention and benefits without paying expensive sponsorship fees. There are two main types of ambush marketing - direct association using logos or imagery from the event, and indirect association through sponsoring broadcasts or subcategories related to the event. Major events have introduced laws and contracts to protect official sponsors, but ambush marketing still occurs through creative marketing strategies.