E-commerce
October 1, 2026
Wondering how to train ChatGPT to respond like your brand? The answer is simple: by providing it with custom instructions and using a dedicated discussion thread. This is essential for getting responses that reflect your tone, your products, and your business goals, rather than generic answers.
However, many merchants neglect this personalization and settle for vague prompts, resulting in bland outcomes. To avoid this pitfall, you need to structure your instructions and your conversations.
So, how do you train ChatGPT to respond like your brand? On the agenda:
Why personalizing ChatGPT's responses is crucial for your e-commerce?
How to enable custom instructions on ChatGPT?
What information to include in the custom instructions?
How to define the ideal response style for your brand?
How to use a dedicated discussion thread to train ChatGPT?
Let's go.
Summary
Why personalizing ChatGPT responses is crucial for your e-commerce?
When you use ChatGPT without customization, the responses are often generic and lack specificity. For an e-commerce business, this means texts that do not reflect your brand, your products, or your audience. The result: bland content that does not engage your customers.
By customizing the responses, you get texts aligned with your tone, your selling points, and your positioning. This improves the consistency of your communication and builds customer trust. Furthermore, tailored responses can increase your conversions because they meet the precise expectations of your target audience.
Think of ChatGPT as an assistant you are training. The more relevant information you give it, the more effective it becomes. It is an investment of time that pays off in the long run. By taking the time to clearly define your brand identity, you enable the tool to generate content that resonates with your audience and stands out from the competition.
Convert over 2,000 customers on average per month with Qstomy.
The world’s 1st Shopify AI dedicated to customer conversion
Empowering 200+ e-commerce merchants
How do I enable custom instructions on ChatGPT?
To enable custom instructions, you must have a premium account, which costs about $20 per month. Once logged in, click on your name in the bottom left of the interface, then select "Custom instructions".
You will then see two fields to fill in. The first asks what ChatGPT should know about you to provide better answers. The second specifies how you would like ChatGPT to respond. These fields have a generous limit of 1,500 words each, leaving you plenty of room to detail your needs.
Once your instructions are saved, they will automatically apply to each new session. You can modify them at any time, and they also work with third-party plugins, provided you are logged in to ChatGPT. This feature is a real asset for e-merchants who want to save time while maintaining consistent communication.
What information should be included in the custom instructions?
In the first field of the custom instructions, describe your activity, your company, and your products. Mention your brand name, your unique selling points, and what sets you apart from your competitors. For example, if you sell organic cosmetics, specify this and explain why it is an advantage.
You can also indicate how to position your brand in the responses. Do you want to appear premium, accessible, innovative? These details help ChatGPT adapt its language and suggestions.
Feel free to include examples of your products or past campaigns. The more context you provide, the more precise and useful the responses will be for your business. Also, remember to mention your target audience, their preferences, and their buying habits, so that ChatGPT can create messages that speak directly to them.
How to define the ideal response style for your brand?
The second field of custom instructions allows you to specify the desired response style. You can choose between professional, casual, academic, neutral, or even opinionated. This depends on your brand image and your audience.
Also indicate the jargon of your industry that ChatGPT should use. For example, if you sell technical clothing, mention terms like "water-repellent" or "breathability". This will make the answers more credible.
You can also define specific guidelines, such as "include an FAQ section every time I ask for an article". This ensures that the answers meet your expectations in terms of structure and content. By specifying the desired length, level of detail, and format (lists, paragraphs), you further refine the final result.
How to use a dedicated thread to train ChatGPT?
If you use the free version of ChatGPT, you can create a separate thread to train the tool. This thread should contain all the information about your business, your products, and your preferences. Do not delete it, as ChatGPT cannot reference multiple threads simultaneously.
In this thread, provide details about your activity, just as you would in custom instructions. Then, use this same thread for all your requests. ChatGPT will then be able to refer to the information shared in the ongoing conversation.
Keep this thread open and active. If you start a new session, you will need to reintroduce the information, as ChatGPT does not retain it from one session to another. It is a simple but effective trick to improve personalization. Remember to pin this thread in your browser for quick access each time.
How do you maintain easy access to your dedicated thread?
To maintain easy access to your dedicated thread, you can create a direct link. On a desktop browser, click the "Share" icon in the top right, then click "Copy Link". This will give you a direct URL to the session.
This link is convenient for quickly finding your thread, especially if you are working on multiple projects. You can also share it with colleagues if you want them to use the same information.
By keeping this link handy, you avoid wasting time searching for the right conversation. This is a significant productivity gain for a busy merchant. Additionally, you can add it to your bookmarks or integrate it into your project management tool for even smoother access.
What pitfalls should be avoided when customizing ChatGPT?
A common pitfall is giving instructions that are too vague. For example, saying "be professional" is not enough. You need to specify what that means for your brand: formal, warm, technical, etc. Without precision, ChatGPT remains generic.
Another pitfall is neglecting to update the instructions. Your business evolves, your products change. If you don't update your instructions, ChatGPT risks giving outdated information.
Finally, avoid overloading the instructions with too much useless information. Stay focused on the essentials: your business, your products, your tone. Too many details can overwhelm the tool and reduce the quality of the responses. It is therefore crucial to find the right balance between precision and conciseness.
How do you evaluate the effectiveness of your custom prompts?
To find out if your custom prompts are working, evaluate the quality of the responses. Are they aligned with your tone? Do they contain key information about your products? If not, adjust your instructions.
You can also compare the responses before and after customization. Note the differences in terms of relevance, style, and accuracy. This gives you a clear idea of the impact of your settings.
Finally, test on concrete cases: writing product descriptions, responding to customer questions, or content for your campaigns. If the results are satisfactory, your prompts are effective. If not, iterate. Do not hesitate to ask for feedback from your colleagues or customers to get external input on the relevance of the generated texts.
How to use custom ChatGPT for your e-commerce?
Once ChatGPT is customized, you can use it to generate blog posts, product descriptions, or answers to frequently asked questions. This saves you precious time while maintaining editorial consistency.
For example, to optimize your product pages, you can ask ChatGPT to write copy that highlights the benefits of your products, using your tone. This improves the customer experience and can increase your conversions.
Also consider using ChatGPT to create Q&A paths that guide your customers to the right product. This is an approach that boosts engagement and satisfaction. By automating these repetitive tasks, you free up time to focus on more strategic aspects of your business.
How to avoid generic ChatGPT responses?
To avoid generic responses, be specific in your prompts. Instead of asking to "write a product description," specify the product, its features, and the tone to adopt. For example: "Describe this vegan leather bag, emphasizing its durability, with a warm tone."
Use concrete examples in your instructions. Show ChatGPT what you expect by giving it an example of a good response. This helps it understand your style and expectations.
Finally, feel free to ask follow-up questions. If an answer does not suit you, ask for adjustments. ChatGPT is an interactive tool, and the more you interact, the more it adapts. By adopting this iterative approach, you will progressively refine the quality of the responses and obtain texts perfectly aligned with your brand.
Qstomy, the Shopify AI agent, goes further than ChatGPT
Qstomy, the Shopify AI agent, goes further than ChatGPT by focusing on the customer experience. It guides your customers to purchase through personalized recommendations, upsell and cross-sell suggestions, and efficient order tracking.
Unlike ChatGPT, which requires manual customization, Qstomy is designed to integrate directly with your Shopify store. It uses your product and customer data to deliver relevant answers, with no effort on your part.
With over 100 merchant users, Qstomy improves conversion, reduces cart abandonment, and provides responsive after-sales service. It is a turnkey solution for optimizing the customer experience, whereas ChatGPT requires configuration work. By combining both tools, you can leverage the versatility of ChatGPT and the specialization of Qstomy to maximize your results.
Checklist for training ChatGPT to respond like your brand
Here is a checklist to train ChatGPT to respond like your brand:
Activate custom instructions: go to settings and fill in both fields.
Describe your business: name, products, selling points, differentiators.
Define the response style: tone, jargon, length, structure.
Create a dedicated thread: for the free version, keep one session with all the info.
Copy the thread link: for easy access.
In short: personalizing ChatGPT takes a little time, but the benefits are significant for your e-commerce. Responses aligned with your brand improve credibility and conversions. By following these steps, you will transform ChatGPT into a true ally for your communication.
FAQ
Can I use ChatGPT for free to customize responses? Yes, by creating a dedicated discussion thread, but custom instructions are only available with a premium account.
How long does it take to train ChatGPT? A few minutes to set up the instructions, then a little time to adjust based on the results.
Does Qstomy replace ChatGPT? No, Qstomy is a specialized AI agent for Shopify, while ChatGPT is a versatile tool. They can be complementary.
To go further: How to create Q&A paths to guide a customer to the right product - Qstomy, How does SEO work for e-commerce sites? - Qstomy, Training an e-commerce chatbot with Shopify: using the right data without creating wrong answers - Qstomy, How to use an AI chatbot to compare two products in your store? - Qstomy, Increase sales with smart product recommendations - Qstomy, How to set up e-commerce tracking on Google Ads? Conversions and GA4 - Qstomy, How to build an e-commerce Facebook Ads strategy? - Qstomy.
Enzo
October 1, 2026
