How to write better AI prompts for your marketing
Writing a good AI prompt is the difference between a generic response and something you can actually publish. The skill of crafting those instructions is called prompt engineering, and it is one of the most useful things you can learn if you use tools like ChatGPT, Gemini or Claude for your marketing.
The good news is that you do not need technical knowledge to do it well. A better prompt simply means being more specific about what you want, who you are writing for and what the AI should do with the information.
Start with a role and a context
The fastest way to improve an AI response is to tell it who it is and who it is talking to. Instead of "Write a Facebook post about our new service," try this:
"You are a marketing assistant writing for a small landscape gardening business. Our customers are homeowners with medium-sized gardens. Write a Facebook post announcing that we now offer artificial grass installation. Keep it to 150 words and end with a question that encourages comments."
The first prompt produces something generic. The second gives the AI a role, an audience, a specific message, a length and a format. That is prompt engineering in practice.
Give it structure
AI tools respond well to structured instructions. If you need a list, ask for a list. If you need a comparison, ask for a table. If you need options, ask for three.
A good structure prompt looks like this: "You are a content writer for a UK digital marketing agency whose target audience is local business owners. Generate five blog post ideas about local SEO. For each idea give me a working title under 60 characters, a one-line summary and a suggested primary keyword. Present this as a table."
The structured prompt produces usable output in a format you can work with immediately.
Include an example
The most reliable way to match a specific tone is to show the AI an example. Paste a paragraph of copy you already like and say "Rewrite the following in this style." The AI can mimic a tone far more accurately from an example than from a description like "make it friendly."
For instance: "Here is a paragraph from our about page [paste text]. Write a new version that says the same thing using simpler language and shorter sentences."
Avoid the common mistakes
The biggest mistake business owners make with AI prompts is being too vague. A vague prompt gives you a vague answer, which you then spend as much time editing as it would have taken to write from scratch.
Another common mistake is trusting the AI's facts. ChatGPT and its rivals can produce convincing sentences about things that are completely wrong. Always check dates, prices, names and statistics. Treat the AI output as a first draft from a fast but junior assistant who might guess when they do not know.
Five marketing tasks where AI prompts save time
Drafting five versions of a Facebook or Instagram caption for a product launch. Rewriting a services page in plain English for a new audience. Generating ten FAQ questions and answers about a specific service. Creating a week of social media post ideas around one campaign theme. Summarising a long industry report into a two-paragraph LinkedIn post.
A prompt template you can reuse
Adapt this template for almost any marketing writing task.
Role: who the AI should be. Audience: who you are writing for. Task: what you want it to write. Tone: professional, friendly, formal. Length: word count or paragraph count. Format: paragraphs, bullet list, table or options. Constraints: anything to avoid or include. Example (optional): paste something in the right style.
Key takeaway
Prompt engineering is not a technical skill. It is about being clear, specific and structured in your instructions. The more effort you put into the prompt, the less effort you need to spend editing the output.
To see how an expert team uses AI inside a real content workflow, take a look at our AI digital marketing services.
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