Video game sales involve publishers selling licenses to players, primarily through digital storefronts (like Steam, eShop) where platforms take ~30% cut, or physical retailers who take a larger share. Sales data tracks units sold by genre (Action, Shooter, RPGs dominate), region (North America leads), and platform, with major trends including massive digital growth, rising development costs, and the industry's resilience, using data analysis to understand market shifts and player preferences.