A programmatic advertising agency buys display, video and connected television inventory through automated platforms rather than by negotiating with publishers one at a time. The pitch is scale and precision; the risk is opacity, because the buyer rarely sees the true media cost, the fee stack or the real list of sites the money reached. This page explains what the machinery is, which deal types exist and how they differ, and the specific questions that separate an agency that will show you the arithmetic from one that would rather not.
What the platform actually does
Programmatic buying runs through a demand-side platform. Google's own, Display and Video 360, describes itself as a place where teams execute digital advertising campaigns, and organises the work into five parts: campaigns, where insertion orders and line items are created and monitored; audiences, with profile analysis and frequency caps; creatives, built in an ad canvas and format gallery; inventory, where buyers discover and manage inventory from broadcasters and publishers and negotiate deals in a marketplace; and insights, for metrics and performance analysis. Google frames the value in terms of transparency and control, so that teams know exactly where their ads are running. That framing is worth holding onto, because it is precisely the thing an agency intermediary can take away from you: the platform can show where the money went, but only if your contract gives you access to the reporting that shows it.
Deal types, and why they change the price
Inventory is not one thing. At one end is the open exchange, where impressions are auctioned in real time and price is set by competition. At the other are guaranteed arrangements negotiated directly with a publisher. Programmatic guaranteed deals are Google's name for the second kind executed through the platform: an automated buying solution with tagless trafficking, advanced targeting and consolidated reporting and billing, which lets buyers execute direct buys with publishers while eliminating manual processes such as exchanging tags, troubleshooting discrepancies and handling multiple invoices. The negotiation runs through proposals containing campaign details, inventory and a proposed price, passed back and forth until both parties agree, and one structural detail matters commercially: publishers control pacing for programmatic guaranteed deals, not buyers. A media plan that mixes open exchange and guaranteed inventory is mixing two different risk profiles, and an agency should be able to say what share of your budget sits in each and why.
The fee stack is the whole negotiation
Between your budget and a publisher's revenue sit several deductions: the agency's fee, the demand-side platform fee, data or audience segment fees, verification and brand-safety vendors, and on the sell side the exchange's own cut. Each is defensible on its own and together they can consume a substantial share of a budget without anything improper happening. The only way to know is to ask for the model in writing. Is the engagement disclosed, where you see the media cost and pay a stated fee, or is it undisclosed, where the agency buys inventory and resells it to you at a marked-up price it does not have to reveal? Both exist and both are legal; only one lets you judge performance. Ask which platform seats are used and who owns them, since an agency-owned seat means your campaign history and audience data may not travel with you when the contract ends.
What to ask before you sign
Five questions, in order. First, is the fee model disclosed or undisclosed, and what are the specific percentages or rates at every layer. Second, whose platform seat is used and who owns the data and the campaign history in it. Third, what does the inventory report look like, at domain or app level, and how often do you receive it. Fourth, how is brand safety and fraud verification handled, by which vendor, and who pays for it. Fifth, how is success measured, and specifically whether the agency is proposing an incrementality test or a geographic holdout rather than only attributed conversions, because click attribution in display and connected television flatters almost every campaign that runs. Add a practical one for television plans: TV screens are a distinct device class in Google Ads, described as devices that stream TV content such as smart TVs, gaming consoles and connected devices, and that class is available for display and video campaigns rather than search, so a plan that promises television reach should say which campaign types deliver it.
Questions people ask about programmatic advertising agency
Do I need an agency to buy programmatically?
Not necessarily, but the platforms are complex and most have minimum commitments, so small advertisers usually access them through an agency or a managed service. The trade-off is expertise against transparency, which is why the fee model is the first thing to settle.
What is the difference between open exchange and programmatic guaranteed?
Open exchange inventory is auctioned in real time with price set by competition. Programmatic guaranteed is a direct deal with a publisher executed through the platform, with agreed inventory and price and tagless trafficking, and with pacing controlled by the publisher.
How do I know where my ads actually ran?
Ask for domain-level or app-level delivery reporting as a contractual deliverable, not a favour. Google frames its platform around knowing exactly where ads are running, so an agency that cannot produce that report is choosing not to.
What is an undisclosed or arbitrage model?
One where the agency buys media and resells it to you at a price that does not separate media cost from margin. It is a legitimate commercial structure, but it makes efficiency claims unverifiable, so know which model you are buying before you compare quotes.
How should programmatic performance be judged?
By a test agreed in advance. Attributed clicks and view-throughs overstate display and connected television performance, so ask for an incrementality or geographic holdout design alongside the standard reporting.