What programmatic advertising actually buys you, and when it does not

Programmatic advertising is the automated buying of advertising space across thousands of websites and apps, targeted at audiences rather than at a single platform’s users. Where search captures people already looking and social captures people scrolling, programmatic reaches people in the rest of their day.

That is genuinely useful for some businesses and a waste of money for others, which is why we scope programmatic advertising against the alternatives rather than by default, and the difference is usually decided by three questions that rarely come up in the pitch.

Was the advert actually seen?

An impression means an advert was served. It does not mean anybody saw it. An advert can be served below the fold on a page nobody scrolls, or in a slot that never enters the viewport.

Viewability measures the proportion that had a genuine chance of being seen, and it is the first thing to ask about. A campaign reporting a large number of impressions and poor viewability has mostly bought nothing. Insist on the viewability standard being used and the figure achieved, not just the impression count.

Where does the money actually go?

Between your budget and the publisher sit a demand-side platform, an exchange, often a supply-side platform, and sometimes verification and data vendors. Each takes a share. The industry term for the gap is the ad tech tax, and it is not a scandal — these are real services — but it is frequently invisible.

The question worth asking any partner, directly: what percentage of what I pay reaches a publisher? An agency that cannot answer, or will not, is a reason to be careful. It is also why our pricing publishes percentage-of-spend rather than burying a margin inside a media rate.

Where will it appear?

Open-web inventory includes places no brand wants to be. Brand safety controls — category exclusions, publisher blocklists, allowlists of approved sites — manage that, and every one of them is a trade-off.

Tighter controls mean less available inventory and higher prices for what remains. That is a legitimate choice, but it should be made deliberately and reviewed, rather than left at whatever the platform defaults to.

When programmatic is the wrong tool

Programmatic rewards scale. It needs enough budget and enough time for the optimisation to find the pockets of inventory that work, and the learning period costs money before it returns any.

Below a meaningful monthly commitment, that learning never completes and the spend is thin across too much inventory to teach anyone anything. For most businesses in that position, search marketing captures existing demand more cheaply and paid media on social reaches a defined audience with better feedback.

It is also the wrong first channel. If search and social are not yet working, programmatic will not rescue them — it will simply add a less measurable channel to an unmeasured mix.

When it earns its place

• Your buyers are a defined segment that search volume does not reach, such as a narrow professional audience.
• You need reach beyond what one platform’s users represent.
• You are running a considered-purchase campaign where repeated exposure matters more than immediate response.
• Search is already capturing existing demand and you need to create more of it.

What to ask before committing

1. What percentage of my budget reaches a publisher?
2. What viewability standard are you reporting against, and what did we achieve?
3. Can I see the list of sites my adverts ran on?
4. What exclusions are applied, and what are they costing in reach?
5. How is a conversion attributed, and over what window?

All five have straightforward answers. A partner who treats them as awkward has told you something useful.