How do buyers build contextual keyword lists that read pages correctly?
Part of Contextual targeting
The short answer
Contextual keyword targeting places ads on pages, apps and videos whose content relates to chosen words. A sound setup uses short include lists grouped by theme, a negative list that removes unwanted senses without blocking useful pages, a written rule for words with two meanings, and tests on real pages before and after launch.
Key takeaways
- Platforms match keywords to a page's overall theme, so a keyword list describes content, not exact strings on a page.
- Google Ads content keyword exclusions are exact match only, while Display & Video 360 negatives expand to plurals and synonyms, so the same list behaves differently.
- Words with two meanings should be included as context phrases and excluded only in their unwanted sense.
- Negative keywords remove irrelevant pages; Display & Video 360 says they are not intended as a brand safety tool.
- A keyword list needs an owner, a version history and named events that trigger a review.
How does contextual keyword targeting read a page?
Keyword targeting on display and video inventory is not search advertising. Nobody typed the words. Google's help page about contextual targeting (opens in a new tab) says its system analyzes each Display Network page's text, language, link structure and page structure to determine a central theme, and an ad becomes eligible when a keyword using the Content setting matches the page's concepts or central theme. The same page says the whole ad group keyword list is used as a single unit for targeting.
Display & Video 360 works in a similar spirit. Its keyword targeting (opens in a new tab) help says it checks webpage text, app store descriptions and video metadata, matches positive keywords by phrase, and expands them to plural, canonical and synonym forms. It also warns that keyword targeting may not work well for in-app content, because some apps are categorized by their main function rather than what is on screen.
How do Google Ads and Display & Video 360 treat keyword lists?
Google Ads and Display & Video 360 document different rules for keyword lists. A list moved from one to the other without changes will not behave the same way.
| Rule | Google Ads | Display & Video 360 |
|---|---|---|
| How include keywords match | Matched to a page's concepts or central theme; Google advises against keyword match types for contextual targeting | Phrase matching, expanded to plurals, canonical forms and synonyms |
| How exclusions match | Account level content keyword exclusions support exact matches only, so spelling matters | Negatives cover exact matches and also expand for a broader match |
| Suggested list size | One help page suggests about 5 to 10 keywords per ad group; another says 5 to 50 | No suggested size; limits apply |
| Exclusion limits | Up to 1,000 content keywords excluded at the account level | 1,000 advertiser level negatives; 20 lists of up to 5,000 keywords; a line item can use 4 lists plus 5,000 individual negatives |
| Where exclusions do not apply | YouTube Shorts, the YouTube Home and Subscriptions feeds, and YouTube Sponsorship campaigns | In-feed YouTube ads and Shorts ads |
| Time to take effect | Not stated for keywords | Added keywords may take one or more days to change bidding |
Google's content suitability page (opens in a new tab) is the source for the exact match rule and the 1,000 keyword limit, and it says excluded content keywords apply to YouTube, Display Network and Google video partner inventory. The two Google sizing figures come from the contextual targeting page and the older keyword contextual targeting (opens in a new tab) page; when they disagree, start small and add themes as separate ad groups.
How do you build an include list that stays on topic?
Six steps to a contextual include list
- Split the brief into themes. Give each theme its own ad group or line item, such as project plans, tool reviews and finishing techniques, so the list for each one stays tight.
- Describe content, not customers. Google's guidance is to start with themes that describe the product or service and avoid themes aimed at audiences. Write the subject of the article, such as dovetail joint tutorial, not the reader, such as weekend hobbyists.
- Use two or three word phrases. Google suggests keeping keywords to about two to three terms so relevance holds without cutting reach too far. A phrase carries its own context.
- Write a list per language. A French page about menuiserie will not match English phrases reliably, so a bilingual brief needs its own French list checked by a fluent reader.
- Skip exhaustive variants. Display & Video 360 already adds plurals and synonyms, and Google matches themes, so long lists of near duplicates add little and are hard to audit.
- Test on real pages. Collect ten pages the brand would love and ten it would refuse, and check which ones each phrase would plausibly match.
How should a list handle words with more than one meaning?
Google warns that some words have multiple meanings, and that excluding a content keyword prevents ads from showing on any content related to that word, even in a different context than intended. The same risk applies to inclusion. The fix is to include words only inside phrases that fix their sense, and to exclude only the phrase that names the unwanted sense.
| Word | Sense the brief wants | Other senses | Include as | Exclude as |
|---|---|---|---|---|
| router | A tool that cuts edges and grooves in wood | Network equipment for home internet | wood router, router table, router bits | wifi router, mesh router |
| plane | A hand tool that shaves wood flat | Aircraft and air travel | hand plane, block plane, jack plane | plane crash, plane tickets |
| jig | A guide that holds work in place | A dance; a phrase meaning a trick is exposed | pocket hole jig, dovetail jig | irish jig, the jig is up |
| vise | A bench clamp | Vice, a moral failing or an office title, easy to confuse in spelling | bench vise, woodworking vise | none; never exclude the single word vice |
| finish | A coat of oil, stain or lacquer | The end of a race or project | wood finish, finishing oil | none; the other sense is harmless |
How do you build a negative list without blocking good pages?
A negative list can grow by accretion: each bad placement report adds a word, and none is removed. Keep two kinds of negatives apart, because they answer different questions and belong to different owners.
Negative keyword list check before launch
- Each relevance negative names an unwanted sense of an included word, such as wifi router.
- Suitability concerns are handled with the platform's suitability settings and the client's tolerance, not only with single word negatives.
- No single word negative would block a page type the brief wants, such as workshop safety guides blocked by the word injury.
- Every negative was spelled as the platform matches it, since Google Ads exclusions are exact match only.
- The list was tested against the same set of wanted and unwanted pages used for the include list.
- Each negative has a date and a reason, so it can be removed when the reason ends.
Display & Video 360's help states that negative keyword targeting is not intended to be a form of brand safety targeting, and explains why ads may still appear near excluded terms: variations of a term, multi-word negatives where only one word appears, and other targeting on the line item. It also says inventory whose context cannot be determined is excluded from a line item that uses keyword exclusions, which can quietly shrink reach. Our guides to brand suitability and scoping a keyword blocklist cover the controls built for that job.
What does a keyword list look like on a real brief?
Fictional example
A woodworking tool retailer in Missouri and Illinois
An unnamed retailer of woodworking hand tools and benchtop machines wants English display ads in Missouri and Illinois, around Kansas City, St. Louis and Springfield, beside project plans, tool reviews and finishing guides.
The planner builds three themes. Project plans holds phrases such as cutting board plans, bookshelf build and dovetail joint tutorial. Tool reviews holds hand plane review, router table setup and table saw blade guide. Finishing holds wood finish, finishing oil and stain on pine.
The negative list stays short: wifi router, mesh router, plane tickets, irish jig. Saw is never excluded on its own, and injury is left to the suitability settings so that workshop safety guides stay in reach. Before launch, the planner checks every phrase against twenty saved pages, and the list is saved as version one with the reason for each negative.
What events should trigger a keyword list review?
Lists decay when the world changes around them. Tie reviews to events rather than to a fixed calendar alone, and record each change as a new version with its reason.
| Event | What to check |
|---|---|
| First days of a flight | Google's guidance is to check where ads ran after a few days and exclude poor matches; read a sample of served pages, not only domains |
| A new product or season | Add a new theme group rather than stretching an old one |
| A news event uses one of the list's words | Whether a negative phrase is needed for the event's sense, and whether it can be removed later |
| A move to another buying platform | Exact match and expansion rules differ, so rewrite exclusions for the new platform |
| A new language in the brief | A separate list in that language, checked by a fluent reader |
| Reach drops without a budget change | Whether recent negatives or undeterminable context exclusions removed good inventory |
Where does PlacementGraph fit beside keyword lists?
Frequently asked questions
Do keyword match types matter for contextual targeting?
Mostly not. Google's contextual targeting help advises against match types for display contextual targeting, saying they add no advantage and can confuse reporting. Display & Video 360 uses phrase matching with automatic expansion, and only YouTube line items accept quote and bracket symbols for phrase and exact terms.
Why did an ad run on a page that contains a negative keyword?
Platforms match themes, not strings. Display & Video 360 lists variations of the term, multi-word negatives where only one word appears and other targeting on the line item as reasons. Google says it cannot guarantee that all related content is excluded. Read the page, then decide whether a phrase negative or a placement exclusion fits better.
How long does a new keyword take to start working?
Display & Video 360 says adding keywords to an active line item may take one or more days to change bidding, and keywords about a new subject, such as recent news, may take one or more days to become targetable. Google Ads does not state a time for content keywords, so check delivery after a few days.
Should one keyword list serve both websites and YouTube?
Not without edits. Google's help says keywords and topics act as hints on YouTube Demand Gen inventory rather than strict targets, and Display & Video 360 keyword exclusions do not apply to in-feed or Shorts ads. Keep a website list and a YouTube list, and check each against the surfaces the campaign will buy.
Sources
- About contextual targeting (opens in a new tab)Google Ads Help
- Keyword contextual targeting (opens in a new tab)Google Ads Help
- About content suitability (opens in a new tab)Google Ads Help
- Keyword targeting (opens in a new tab)Display & Video 360 Help
- Account limits in Display & Video 360 (opens in a new tab)Display & Video 360 Help
Researched and written by PlacementGraph Research. Read how we research, source and update these pages. Corrections: diana@placementgraph.com.