Reach customers where they're making decisions with ChatGPT ads.
Castle helps ambitious brands launch, optimise and scale high-performing ChatGPT advertising campaigns that put your business in front of customers at the exact moment they're researching products, comparing services and deciding what to buy.
Book a strategy callChatGPT Advertising
AI-powered search is changing the way people discover products, research services and make purchasing decisions. Millions of users now turn to ChatGPT every day to ask questions, search for services, compare providers and seek personalised recommendations. This creates a whole new opportunity for businesses to connect with their potential customers on a revolutionary new platform.
As the UK's leading ChatGPT advertising agency, Castle helps businesses of all sizes launch, manage and optimise ChatGPT advertising campaigns that put your brand in front of highly engaged audiences exactly when they are looking for your product or service. If you're looking to generate more leads, increase your online sales or build brand awareness, we can deliver an AI advertising strategy that delivers measurable results.
Ready to start advertising on ChatGPT? Get in touch with our team today to discuss your goals and discover how AI search advertising could help grow your business.
Book a discovery callExplainer
OpenAI has recently introduced ChatGPT ads. This is a new form of digital ads that allow businesses to reach users where they are actively searching through AI-powered conversations.
Ads are currently eligible to users on the Free and Go ChatGPT plans and are selected to be shown to people based primarily on the context and intent of the conversation rather than traditional keyword matching you find with Google ads. Ads in ChatGPT appear separately from responses and are clearly labelled as sponsored.
ChatGPT ads engage users from their initial research right through to the final decision, reaching them at every stage of the funnel.
A user types a question or research prompt into ChatGPT's interface
The AI analyses query context and intent to generate a helpful response
A clearly labelled 'Sponsored' ad appears, matched by conversational context
High-intent users click through to your brand's landing page to learn more
Why Choose ChatGPT Ads
Reach customers earlier in the buying journey
Access 900 million active weekly users
Appear during research
Highly relevant placements
Context-driven targeting
Less reliance on keywords
Early adopters stay ahead of the curve
Future-proof marketing
Supports broader AI search strategy
How It Works
ChatGPT advertising is designed to work contextually and is separate from ChatGPT's core responses. Ads appear alongside conversations, only where relevant, when users are actively exploring related topics or asking relevant questions, rather than interrupting the natural flow of answers and conversation. Ads are clearly labelled as sponsored so users can distinguish them from AI generated responses.
This means your ads reach an audience that actively chooses a free tier — typically explorers, researchers, and decision-makers evaluating tools before committing to a paid plan.
Rather than targeting exact keywords, ChatGPT uses conversational context and intent signals to determine which ads are relevant. Advertisers can provide context hints describing the types of conversations where their ads should appear, helping OpenAI match campaigns with users exploring related topics.
For example, if someone is asking "I'm looking for accounting software for a growing business", ChatGPT will be able to show your accounting software as an ad naturally within that conversation. Or if someone asks "I want to compare CRM systems" it can show ads for CRM providers.
When ChatGPT shows people ads, it's at moments of genuine intent and active decision making. People have often had a conversation, asking ChatGPT to gather research and then asked it to compare, recommend and help them choose the best option for them. These are highly commercial moments for ads to appear.
The Case for ChatGPT Ads
As more people turn to AI to research products, compare services and make purchasing decisions, ChatGPT has become a powerful new marketing channel for brands. Advertising on ChatGPT allows you to reach highly engaged users at the moment they're actively seeking information and recommendations. Unlike other forms of ads, ChatGPT ads are designed to be useful and feel relevant to the users' requests, rather than interruptive. This helps brands build trust, influence choices and present themselves as the solution they need right when it matters most.
ChatGPT has around 900 million weekly active users who rely on it every day for advice, research and recommendations. Traditional search has changed with the introduction of ChatGPT and other generative AI, so advertising on the platform gives your business access to one of the fastest-growing digital audiences in the world.
ChatGPT users are often asking detailed questions because they're actively researching a product, comparing providers or preparing to make a decision, creating valuable opportunities to reach potential customers with strong purchase intent.
A growing number of people use ChatGPT as their first choice for searching and research before they ever visit a search engine or website, letting your brand become part of those early conversations and influence decisions early.
ChatGPT advertising uses the context and intent behind a conversation to determine which ads are most relevant, helping your adverts appear alongside discussions that closely align with your products or services.
AI search advertising is still an emerging channel, giving forward-thinking businesses the opportunity to establish a presence, build brand awareness and develop a competitive advantage before the market becomes saturated.
AI-powered search continues to grow alongside traditional search engines, so advertising on ChatGPT enables your business to diversify its marketing strategy and stay visible wherever your customers are looking for answers.
Our Expertise
As AI-powered search continues to reshape how people discover brands, having the right advertising strategy is more important than ever. At Castle, we help businesses unlock the potential of ChatGPT advertising by developing tailored campaigns that put your brand in front of highly engaged users at the moments that matter most.
Whether you're looking to launch your first ChatGPT advertising campaign or want to integrate AI search into your wider digital marketing strategy, our team can guide you every step of the way. We take the time to understand your business, your audience and your commercial objectives before building campaigns designed to reach the right people at the right moment.
From campaign strategy and setup to audience targeting, optimisation and performance reporting, we manage every aspect of your ChatGPT advertising. Combining our expertise in paid media, SEO and AI search, we create data-driven campaigns designed to maximise visibility, generate high-quality leads and deliver measurable business growth.
Industry Fit
ChatGPT ads are ideal for any brands that want to reach customers when they are actively researching, asking for recommendations and making decisions. Some of which include:
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