ContextIn search advertising, you choose keywords, set a bid, and win an auction when someone's query matches your keyword closely enough — exact, phrase, or broad match. The system is explicit: you can see exactly which term triggered your ad, and a keyword that gets no traffic is easy to diagnose.
Comparison
Context Hints vs. Keywords
Keywords identify query text through match rules. Context hints describe the meaning and situations where an ad group may be relevant.
Do not write a keyword list in sentence form.
A context hint should describe a coherent buyer need or situation. It guides semantic relevance; it is not an exact-match command or guaranteed placement rule.
Old and new models
From matching text to describing meaning.
ChatGPT Ads do not use exact, phrase, or broad keyword match types for this field. Context hints describe relevant conversations, needs, topics, products, or situations, and guide semantic matching. Delivery still depends on surrounding factors including creative and landing-page relevance, eligibility, objective, budget, and bid.
Side by side
The practical differences.
Matching
KeywordsText (exact/phrase/broad)
Context hintsMeaning
Fallback if too narrow
KeywordsBroad match still catches some traffic
Context hintsDelivery may narrow; check the hint and campaign settings
Unit of targeting
KeywordsA list of query terms
Context hintsFocused conversation themes at ad-group level
What to optimize
KeywordsBids, match types, negatives
Context hintsTheme clarity plus creative, landing-page, bid, and delivery signals
Important boundary
Context hints are not negative keywords.
Adding “not,” quotation marks, or a pasted exclusion list should not be assumed to create Google-style blocking behavior. Describe one relevant theme and verify any dedicated exclusion controls in the current Ads Manager interface.