How ChatGPT Ads Targeting Works Without Keywords

What a context hint is

A context hint is one clear sentence about your offer. You write hints for each ad group. OpenAI asks you to cover 3 things: what you sell, who it helps and when it is useful.

These are OpenAI's own examples:

• Running shoes: "Cushioned everyday running shoes for beginners training for their first 5K"
• Local plumber: "After-hours residential plumbing in [city], with an $89 service-call fee for urgent repairs"
• Accounting software: "Bookkeeping software for growing retailers that need to reconcile online and in-store sales"

Each one reads like something you would say to a person. None of them is a list of keywords.

What a context hint cannot do

A hint describes your offer. It does not give OpenAI an order. You cannot use a hint to limit your ad to a city, to set a schedule or to exclude a group.

OpenAI gives this pair as the example. "Residential plumbing services available in Chicago" is a hint. "Show this ad only to people in Chicago" is an instruction, and it does nothing. To reach only Chicago, you set Chicago in the campaign's location setting.

What else decides where your ad shows

• The conversation the person is having, and what they are trying to get done.
• Your ad's title and description.
• The page your ad links to.
• Outside Europe, signals from the person's wider use of ChatGPT, when they have ad personalization on.

Your bid matters too. The auction weighs how relevant your ad is together with how much you bid.

The settings you do control

• Countries. Every campaign needs them. To reach only the United States, select the United States. Selecting all countries and excluding a few still lets your ad run everywhere else.
• States, regions, cities and postal codes. Available for standard campaigns in many markets. Product feed campaigns work at country level only.
• Devices. Desktop web, the iPhone and Android apps, and mobile web.
• Custom audiences. You can upload a customer list to include or exclude people. To include an audience, it needs at least 25,000 matched users. Custom audiences are not available for campaigns in the European Economic Area or Switzerland.

Your ad text has to be short

OpenAI recommends a title of 16 to 24 characters and a description of 32 to 48 characters. The fields accept up to 50 and 100 characters, but Ads Manager warns that longer text may be cut off.

OpenAI also asks for many ads, with a different angle in each. A set of varied ads gives the system more conversations where one of them fits. The description should add something new to the title, and say who the offer is for and when it helps.

Your landing page is part of the targeting

OpenAI reads the page your ad points to. Send each ad to the page that matches it most closely. OpenAI's guidance says to avoid the homepage.

The page also has to let OpenAI's crawler in. The crawler is called OAI-AdsBot. If your site's firewall or your robots.txt file blocks it, your ad shows as "Not serving" with a landing page issue. OpenAI's support team cannot switch that check off for you, so the fix has to happen on your site.

Specific offers get matched and broad ones get lost

OpenAI's published customer stories repeat one pattern. LegalNature ran one campaign for each type of legal document, and every ad led to that document's own page. Talkpal built each ad group around one language-learning need. Stream wrote its ads to one exact technical problem.

Write one ad group for each thing you sell and each reason a person buys it. Give each ad group hints about that one thing, ads about that one thing, and a page about that one thing.

Based on OpenAI's own help pages, policies and customer stories as we read them in late September 2026. The platform changes most weeks, so check the current rules before you spend.

Sources: OpenAI Help Center, ChatGPT Ads collection (Write Context Hints, Create Ad Groups, Create Ads, Launch Campaigns, Set up Custom Audiences, Advertiser Guidance for Allowing OpenAI Web Crawlers). OpenAI customer stories at ads.openai.com/customers.