The Acosta Group study (September 2026) reveals a fundamental shift in how consumers discover and purchase products: AI has become a mainstream shopping channel, with 34% of U.S. shoppers actively integrating generative AI into their purchase journey. This represents a critical inflection point for e-commerce sellers. The research surveyed 1,271 shoppers (May 15-21, 2026) and found that nearly 50% of Gen Z shoppers have been influenced by AI in recent purchase decisions, with adoption rates reaching 74% among Gen Z and Millennials. ChatGPT and Google Gemini dominate as preferred tools, with Google Gemini already used by 25% of shoppers for online product searches—a direct competitive threat to traditional search and marketplace discovery.
The immediate operational impact is profound for sellers across all categories. AI usage concentrates in high-volume, frequently-purchased categories: grocery, household items, and health & wellness products—precisely where margin-conscious sellers operate. Shoppers cite money-saving, product comparisons, time efficiency, and product research as primary motivations, meaning AI is being used to narrow choices and find the lowest-cost options. This creates a dual challenge: 60% of AI-using shoppers rate the technology as trustworthy as other information sources, but trust erodes when AI delivers incorrect information or shows bias toward paid advertisements. For sellers, this means product data accuracy is now a competitive moat—incorrect specifications, misleading descriptions, or pricing inconsistencies will be flagged by AI systems and damage discoverability.
The discovery opportunity is equally significant: 40% of Gen Z and Millennials report willingness to try new brands, creating a window for emerging sellers to capture AI-driven discovery. However, only 22% of AI users trust autonomous agents to make purchasing decisions independently (35% among Millennials), indicating that AI is currently a research tool, not a purchasing agent. The 55% of Gen Z shoppers using AI in physical stores signals that AI-assisted shopping spans both digital and retail environments, requiring sellers to optimize product content for both online and in-store AI assistant queries. Sellers must immediately audit product listings for AI-readiness: structured data accuracy, comprehensive specifications, competitive pricing transparency, and bias-free descriptions are now table stakes for visibility in AI-powered shopping channels.