How to Write AI Prompts for Marketing Content

30 June 2026·3 min read

Quick answer: A good marketing prompt includes four things: who the audience is, what tone to use (with an example of your actual writing), what the content is for, and what to avoid. Skip any of those four and AI tools default to generic, forgettable output. Below is the fill-in-the-blank prompt formula, two real examples, and the one habit that fixes 80% of bad AI output. 🚀

Most people's frustration with AI-written marketing content isn't a tool problem — it's a prompt problem. A vague instruction gets a vague, generic result every time; a specific one gets something you can actually use with minor edits.

What most people get wrong

One-line prompts — "Write a social caption about our sale" gives the AI almost nothing to work with, so it fills the gaps with clichés.
No tone reference — without an example of how you actually sound, AI defaults to a generic, overly enthusiastic marketing voice.
Not saying what to avoid — if you hate exclamation marks or emoji-heavy captions, say so; otherwise expect them.
Accepting the first draft — treat AI output as a first draft to edit, not a finished piece to publish as-is.

The prompt formula

[Content type] for [platform/purpose], aimed at [specific audience]. Tone: [describe it, or paste a sample of your own writing]. Include: [key facts, offer, or points that must be in there]. Avoid: [clichés, phrases or a tone you don't want]. Length: [rough word count or format].

Two real examples

Real estate agency: "Write an Instagram caption for a new listing photo, aimed at first-home buyers in their late 20s. Tone: warm and direct, like the sample below [pasted an old caption]. Include: 3 bedrooms, walking distance to the train station, open home Saturday 10am. Avoid: 'don't miss out' clichés. Length: under 100 words."

Accounting firm: "Write an email to clients reminding them the BAS deadline is in two weeks. Tone: professional but warm, not corporate. Include: the exact date, a link to book a call if they need help. Avoid: sounding like a threat or a late notice. Length: under 150 words."

Why the sample of your own writing matters most

Of the four elements in the formula, pasting a real sample of your own past writing does the most heavy lifting — it gives the AI something concrete to match instead of an abstract description like "friendly but professional," which every business claims and means differently.

💡 Heads up: Never let AI-generated content publish without a human read-through, especially for anything involving facts, dates, prices or claims about your services — AI tools can state incorrect details confidently, and that's on you to catch before it goes out.

Mistakes that quietly produce generic output

Asking for too much in one prompt — a caption, a blog post and three headline options all at once tends to produce weaker versions of each.
Never iterating — a follow-up prompt ("make it punchier," "cut this in half") usually improves the result more than starting over.
Using the same prompt style for every platform — a LinkedIn post and an Instagram caption need different tone instructions, even for the same underlying content.

Frequently asked questions

Do I need to know how to code to write good AI prompts?

No — a good marketing prompt is just clear, specific writing instructions, the same skill as briefing a freelance copywriter.

Can AI actually sound like my brand?

With a real writing sample and clear tone instructions, it can get close. It rarely nails it on the first try, so plan to edit rather than expect a perfect first draft.

Should I fact-check AI-generated marketing content?

Always — especially anything with numbers, dates, prices or claims about your services. Never publish AI content without a human reviewing it first.

What's the fastest way to improve a bad AI response?

Reply with specific feedback ("too formal," "cut the second paragraph," "add a Gold Coast reference") rather than rewriting the whole prompt from scratch.

Keep reading 🤍

Written by

Kate, founder of Chronically Online

I help Gold Coast and Brisbane businesses grow with branding, websites and marketing that actually works.

Work with me ✦