MI GROUP identifies "Invisible Consumers"—over 40% of Thai digital consumers who actively browse online but leave minimal digital footprints (few likes/comments/shares). Despite being overlooked by most brands, these consumers retain brand memory, research purchases offline, and show strong loyalty once convinced. Two engagement strategies emerge: reach The Quiet Absorber through non-intrusive, contextual content (entertainment, banners); engage The Intentional Selector via credible, specialized information (reviews, expert content, AI overviews). Success requires respecting consumer autonomy and appearing at relevant search moments rather than maximizing ad frequency.