Thailand's digital ad market is forecast at 32,339 million baht in 2026, up only 0.3%, the slowest growth in 14 years. Meta is still the largest platform at about 25% of spend but fell 4%, while TikTok rose 16% to about 24%, and Social (+29%) and E-Commerce (+28%) grew fastest. YouTube, LINE and Display fell. Spend is also split by product: skin care leads, while property, automotive and retail favour Meta. If you advertise, check where your category's buyers are and move budget toward TikTok, social and e-commerce formats rather than assuming one platform fits all. Figures come from Kantar and DAAT's agency survey, which covers about 80% of spend.