You have seen the bad version. An email that opens “Dear [FIRST_NAME],” recommends a product you bought last week, and signs off in a tone your brand would never use. It is fast, it is personalised on paper, and it is junk. People can smell it.
This is the fear with generative AI and personalisation: that it floods the world with polite, hollow slop. The fear is fair. But it is not the whole story. Used well, the same tools can write content that feels genuinely made for one person. The difference comes down to what you feed the AI.
Slop happens when AI knows nothing about you
Left alone, an AI writes in a generic, average voice, because that is all it has. It does not know your brand. It does not know this customer. So it guesses, and the guess is bland.
Give it two things, though, and everything changes. Give it your brand: your voice, your rules, the words you would never say. And give it real customer data: what this person actually bought, browsed, and cares about. Now the AI is not guessing. It is writing from facts, in your voice, for this person.
On-brand, not off the rails
The worry that AI will say something embarrassing is real, and the answer is guardrails. You set the boundaries: the tone, the claims it may make, the offers it can mention, the things it must never touch. Good setups also keep a human in the loop for anything sensitive. The AI drafts at scale; people stay in charge of the edges.
Done this way, generative AI is less like a loose cannon and more like a tireless junior copywriter who has read every brand guideline and remembers every customer.
Where it earns its keep
You do not need it everywhere. Point it at the work that is repetitive and high-volume. Product descriptions for a huge catalogue. Subject lines worth testing a hundred ways. The same message reshaped for ten audiences. A first draft of a journey, ready for a human to polish. These are the jobs that used to eat days and now take minutes.
The honest summary
Generative AI does not have to mean slop. Slop is what you get when you give AI nothing to work with. Feed it your brand and your data, set clear guardrails, and keep people on the important calls. Do that, and personalisation stops feeling like a mail-merge and starts feeling like you actually paid attention. Which, finally, you did.