Digital Marketing Index Report: Q4 2025

The analysis evaluates global digital‑marketing dynamics for the final quarter of 2025, emphasizing shifts in channel performance, the rise of generative‑AI as a discovery source, and the concentration of retail‑media reach among dominant platforms. Growth patterns reveal a stark regional divide: India stands alone among the five largest markets as the only one posting positive overall change, while other leading economies recorded declines or stagnation.

In the United States, retail‑media impressions expanded 13 percent quarter‑over‑quarter to reach 123 billion, with Amazon accounting for the entire volume and delivering more than six times the impressions generated by Walmart. This concentration underscores Amazon’s expanding role as the primary conduit for retail‑media exposure in North America. Across the same period, generative‑AI referrals, although still representing less than one percent of total traffic, surged dramatically—up 133 percent year‑over‑year in the United States, United Kingdom and France, and 126 percent in Canada. The rapid acceleration signals that chat‑based assistants such as ChatGPT, Claude and Gemini are emerging as significant discovery engines despite their modest share of overall visits.

Conversely, traditional organic search experienced the only decline among major acquisition channels, falling four percent year‑over‑year. Paid advertising, email marketing and other performance‑driven tactics continued to post gains, reinforcing a broader transition toward paid and AI‑augmented pathways for user acquisition. The findings collectively illustrate a digital‑marketing ecosystem increasingly dominated by platform‑centric retail media and AI‑driven referral mechanisms, while legacy search channels lose ground in mature markets.