Blockchain in advertising.

What blockchain is in plain words

Blockchain is a way of storing records so that they cannot be quietly altered after the fact. Data is written in blocks, each block contains a fingerprint of the previous one, and copies of the chain are held by many independent participants in the network. Forging a single record is impossible: you would have to rewrite the entire chain at once for everyone.

From this follows the main property - records in such a system do not need to be taken on anyone’s word. Any party can verify them independently, without turning to an intermediary who “confirms” that everything is honest.

The second useful concept is the smart contract. It is a program inside the network that fulfils a condition automatically: when an event occurs, money or rights pass to the recipient without manual approval. The terms are written in advance and cannot be changed unilaterally.

Let us make one thing clear straight away: blockchain is not cryptocurrency. Cryptocurrency is merely the first and best-known application of the technology, but the technology itself solves a more general task - storing verifiable records.

Which marketing problems the technology addresses

Opacity of ad buying. Between the advertiser and the platform stands a chain of intermediaries, and it is usually impossible to tell how much money reached the actual impression. The technology makes it possible to record every step of a deal in a shared ledger accessible to all participants.

Unreliable impressions. Part of the advertising budget goes on traffic that never happened or was generated automatically. A verifiable record of every impression removes the dispute between advertiser and platform about what exactly was paid for. For a detailed look at the problem itself, see our article on fraud traffic.

Product authenticity. If the history of an item from production to the shelf is recorded in an immutable ledger, the buyer can make sure they are not looking at a fake. For brands that are frequently copied, this is a stronger argument than any advertising.

Control over personal data. A model in which the person decides for themselves to whom, and for how long, to open access to their data, and companies receive it with explicit consent. The topic overlaps with the broader question of trust in a brand, which we covered in our article on data protection.

Token-based loyalty programmes

This area is the closest to practice. Points issued as tokens differ from ordinary bonuses in two ways. First - their quantity and the rules for earning them are visible and verifiable, rather than depending on what the company decides tomorrow. Second - if desired, they can be made transferable: exchanged between participants or spent with a partner.

The smart contract takes on the mechanics here: the promotion condition is met - the reward is credited, without manual checking and without delays. This removes the typical conflict of “my purchase wasn’t counted”.

An honest caveat: an ordinary loyalty programme solves the same tasks more simply and more cheaply. Tokens make sense where verifiability of the rules matters or where several independent participants who do not trust each other need to be brought together. How retention works without any technology at all - in our article on bringing customers back.

What the technology does not solve

It does not make data truthful. Blockchain guarantees that a record has not changed since it was entered, but not that it was correct at the moment of entry. If a falsehood is written into the ledger, it will stay there forever - now immutable.

It does not remove intermediaries automatically. In practice a new layer appears between the business and the network - solution developers, node operators, wallet services. The saving from cutting out the old intermediaries is often eaten up by the cost of the new ones.

It is not free. Implementation requires development, integration with records systems and support. For a company that has not yet set up ordinary customer records, this is money spent in the wrong place.

And it does not improve the product. No record-keeping technology will make people buy what they do not need.

Who it is already relevant for, and who it is too early for

It makes sense where there are several independent parties that need to reach agreement without mutual trust, and where the cost of error is high. Large ad purchases with a long chain of contractors. Manufacturers suffering from counterfeits. Industries with supply-chain traceability requirements. Joint loyalty programmes of several companies.

For a small company selling services in its own city, the technology will give nothing that careful record-keeping and honest communication would not. Here it works more as a conversation starter than as a tool.

Applicability can be checked with a single question: do you have a dispute with a counterparty or a customer that you cannot settle because each side shows its own figures? If yes - the area is worth exploring. If no - the task can be solved more simply.

How to approach the topic without unnecessary investment

First - do not start with the technology. Describe the trust problem in your own words: who does not trust whom, in what exactly, and what it costs in money. Half of the ideas fall away at this step.

Second - check whether it can be solved by ordinary means: a contract, an independent audit, end-to-end analytics, open reporting to the customer.

Third - if the task does fit after all, take a narrow section. One product category with traceability, one partner programme. A pilot on a limited scale gives a clear answer and does not turn into an endless construction site.

Fourth - count not only development but also support and staff training. A solution nobody knows how to use lives exactly until the end of the pilot.

The technical part here is integration with the website and internal systems: where the customer sees the status, where the data comes from, how it all connects to the records. We cover such tasks as part of website development and linking it to internal systems.