Contextual or personalized? Two ways an ad can find you

Start with the situation, then the person

Contextual advertising uses the situation in which an ad appears: the subject of a page, a current search, or similar immediate context. Personalized advertising uses information associated with a person or their activity to help choose ads. Google describes both approaches and notes that non-personalized ads can still use context such as general location and time.

These are useful categories for understanding a system, but the artwork is not a label for its targeting. A bicycle ad can be contextual on a repair article, personalized after cycling research, or broadly distributed without either of those particular reasons. You cannot read the selection method from the product alone.

Source: Google: How personalized ads work

An audience category is an estimate

Advertisers can use audience segments such as inferred interests, purchasing intent, and people who have interacted with a business. Google’s advertiser documentation distinguishes these from the context of a page. A category is a way to organize possible recipients, not a diagnosis of who you are.

Treat a label such as ‘home improvement’ as a statement about the advertising system’s grouping. It does not establish that you own a home, are renovating, or have made a purchase. Research for someone else, curiosity, and old interests all make a simple identity conclusion unreliable. Record the wording the platform provides instead of translating a category into a personal fact.

Source: Google: About audience segments

Read an explanation in three passes

Open the information or three-dot menu attached to the ad. Find the explanation, then separate what it actually says from what you suspect. Meta describes its explanation as information about factors informing delivery, including model-driven topics; it should not be treated as a complete record of every calculation.

1. Identify the platform and advertiser. A website’s name is not necessarily the name of the company selecting its ads.
2. Copy the reason into a private note using the platform’s exact meaning: current page, general area, activity, or an advertiser audience. If no reason appears, record ‘not disclosed.’
3. Choose a control that matches that reason. A page-context explanation calls for different expectations than a saved-history explanation.

Sources: Meta: Increasing our ads transparency; Google: Advertising: Google Privacy & Terms

Why a relevant ad can remain after personalization is off

On Google, turning off personalization does not remove advertising. A search for a local service can still produce a relevant ad using the current search and area. That outcome is compatible with the setting being off; relevance by itself is not a test of whether the setting worked.

Check the saved setting in the correct account. Then examine the next ad’s explanation if you want more context. Avoid repeatedly refreshing pages or clicking ads to test a theory: changing ads do not give you a controlled experiment, and a click is not needed to read the disclosure menu.

Source: Google: How personalized ads work

A useful conclusion can be a narrow one

A careful conclusion might be: ‘The platform lists my general location, but does not identify a visit to this shop.’ That is more useful than ‘This shop knows everything about me.’ It tells you which control to inspect without making the explanation say more than it does.

If you are comparing ads with a friend, also note the account, platform, page, and time. Even matching those details does not reveal the platform’s internal decision. Use the comparison to generate questions, not to prove that a hidden profile exists. Our guided explainer helps you organize disclosed reasons; it does not inspect your accounts or uncover undisclosed targeting.