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Writing product templates and AI captions that convert

Content · 7 min read · Updated September 9, 2026

A template is the part of your social presence you only write once. Get it right and hundreds of posts inherit the quality; get it wrong and you automate a bad habit. Here is how to structure one, where AI helps, and where fixed copy is better.

1. The structure of a good template

Almost every effective product post has the same four parts:

1. Hook — the first line, the only one everyone reads.
2. Substance — what the product is, or what it does for the buyer.
3. Action — a clear instruction plus the link.
4. Context — a handful of hashtags.

Keep the hook and the action under your control, and let the substance vary per product. That is the split that makes automation safe.

2. Using product variables

Variables are replaced with real values at publish time:

3. Where AI belongs

AI is good at rephrasing a product description into something conversational and different for every item. It is bad at knowing your promise, your legal claims and your tone boundaries. So:

• Let AI write the product-specific middle: the benefit, the use case, the small observation about why it is nice.
• Keep fixed your brand line, your call to action, your link and your hashtags.
• Never let AI generate prices, discounts, stock claims, delivery promises or health and safety statements. Use variables for facts.

4. Writing a prompt that behaves

Specific prompts produce consistent output. Say the length, the tone, the format and the exclusions:

• Weak: “Write a caption for this product.”
• Strong: “Write two sentences about this product for Instagram. Warm, plain English, no exclamation marks, no hashtags, no emoji. Mention one concrete benefit from the description. Do not mention price or shipping.”

Then generate against three very different products — your cheapest, your most technical and your oddest — and read all three. If any of them embarrasses you, the prompt is not finished.

5. Adapting to each network

6. Hashtags without the spam

• Three to five tags is plenty on TikTok and Instagram; one or none on X.
• Mix one broad tag, one category tag and one specific tag.
• Keep them in the fixed part of the template so they stay deliberate.
• Skip tags unrelated to the product — platforms notice, and so do people.

7. Discount-aware templates

The built-in discount templates read the real Shopify discount, code or Buy X Get Y offer, which means a promo post cannot advertise a code that does not exist. Use them for sales rather than hard-coding “SUMMER20” into a caption you will forget to change — and pair a dated campaign with the Disable automation end-of-run action so it cannot outlive the offer.

8. Testing before you scale

1. Create the template and preview it against three different products.
2. Build an automation with a narrow condition — one collection, one network.
3. Let it publish five posts.
4. Read them on the platform, not in the app. Copy reads differently in a real feed.
5. Adjust the template, then widen the condition.

Five posts on the free plan is exactly enough for this test, which is what the free plan is for.

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