Holiday campaigns generate more than revenue—they create some of the richest competitive intelligence opportunities of the year. While most advertisers focus solely on execution and then move on once the season ends, top-performing marketers treat seasonal campaigns as research goldmines. This article explores how advertisers can systematically analyze competitors' holiday strategies across search, social, native, and push channels to uncover winning creative patterns, offer structures, timing strategies, and audience insights that fuel stronger campaigns long after the holiday rush is over.