Map the digital ad tech industry: players, switching costs, take rates and profit pools

Give an overview of the advertising technology (ad tech) market. Explain who the key players are and how they fit together, what keeps their customers from switching to a rival, how each type of player makes money, and where in the industry the profits concentrate. ```hint Follow one ad impression Picture a single ad shown on a news site or in an app, and trace the money from the advertiser's budget to the publisher. Note every company that touches that impression along the way and what it contributes. ``` ### Clarifying Questions - Should the map cover only the open programmatic market, where independent publishers sell through intermediaries, or also the large platforms such as Google, Meta and Amazon that sell ads on their own properties with their own tools? - Is a global view expected, or should I focus on one market such as India? - Which formats are in scope: display and video on websites and apps only, or also search, social, connected TV and ads on retail sites? - Should I end with an implication for a particular kind of company, such as a publisher or an online marketplace that sells ads, or keep it a market overview? ### What a Strong Answer Covers - A coherent map of the value chain from advertiser to publisher, including the data and measurement layer, with real examples at each layer. - The difference between the open programmatic market and closed platforms that own audience, inventory and buying tools, and why it matters for every later point. - Specific switching costs for each type of player rather than a generic appeal to network effects. - How each type of player charges, and how fees stack up between what advertisers pay and what publishers receive. - A reasoned view of where profits sit today and how forces such as privacy changes, retail media and connected TV are moving them. ### Follow-up Questions - Third-party cookies and mobile advertising identifiers are getting harder to use. Which kinds of players lose from this, and which gain? - Why have ads sold by retailers on their own sites grown so quickly, and what would a large online marketplace need to build to run that business well? - You run a mid-sized independent supply-side platform. How do you defend your margins as large buyers cut the number of exchanges they buy through?