Updated: Q4 2025EMARKETER is the leading research, data, and insights provider, helping companies maximize revenue, optimize spend, and anticipate digital disruption through our carefully vetted data sources and proprietary research methodology. Updated: Q4 2025Estimates are based on the analysis of various elements related to the ad spending market, including macro-level economic conditions, historical trends of the advertising market, historical trends of each medium in relation to other media, reported revenues from major ad publishers, estimates from other research firms, data from first-party benchmark sources, consumer media consumption trends, consumer device usage trends, and EMARKETER interviews with executives at ad agencies, brands, media publishers, and other industry leaders. Forecasts are based on the analysis of traffic data from research firms and regulatory agencies; major ad platform company releases; historical trends; internet and mobile adoption trends; and country-specific demographic and socioeconomic factors. Updated: Q4 2025Average mobile web/browser ad cost per thousand (CPM) is the amount advertisers pay for every thousand impressions of their mobile web/broswer ads.