Member Avatar for veledrom

Hi,

I visit ebay and search a particular product. If I open any other website which is not related to ebay shows little banners or adverts which are related to what I looked for in ebay. How do those sites know that I was looking for that particular products?

Thanks for your information in advance

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Dani AI

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As noticed, visiting a product page and then seeing matching banners elsewhere is a targeted ad technique. was right to point to retargeting, and called out Google’s remarketing product. In practice an advertiser or their ad network drops a tiny tracker (a pixel or cookie ID) when a page is viewed; that creates a visitor list used later by ad platforms. More advanced setups (dynamic remarketing) pull product images and prices from a feed so the ad shows the exact item you looked at, and cross‑device matching can link devices when accounts or hashed IDs are involved.

Practical checks and controls: open browser devtools -> Application/Storage -> Cookies to inspect cookies from ad domains, or use privacy extensions (uBlock Origin, Ghostery) to block trackers. Industry opt‑outs are available via the self‑regulatory tool (Opt out of interest‑based ads), and Google’s help pages explain remarketing and how to control personalized ads (). Clearing cookies or using private/incognito browsing stops most immediate retargeting. For advertisers, use tag managers, set clear list durations and frequency caps, and obtain consent where required.

Note: browser privacy changes and laws (GDPR/CCPA) affect how third‑party tracking operates; ad vendors are shifting toward first‑party or privacy‑preserving approaches, so implementations and user controls continue to evolve.

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Member Avatar for chriscentrally

It's called retargeting and this is done through cookies on your website. Retargeting essentially is a service that advertisers use to drive you back to their website. They assume since you actively searched for something, that you are still interested if you left the website and you probably left because you were distracted.

Creepy, right?

Member Avatar for alternativetoo

which browser are you using?

Member Avatar for Dani

It's called retargeting and this is done through cookies on your website. Retargeting essentially is a service that advertisers use to drive you back to their website. They assume since you actively searched for something, that you are still interested if you left the website and you probably left because you were distracted.

Creepy, right?

The Google AdWords system allows you do this, and it's called Remarketing. In fact, DaniWeb does it, by advertising to website visitors who found us through Google search results in the hopes that they will return and join the community. The DaniWeb ads don't necessarily have to be on an IT-based website, since cookies are used to know that they were recently on DaniWeb.

Member Avatar for veledrom

Thanks for your help. That's exactly what I wanted. Now I know what to read about. Retargeting and Remarketting.

Thanks again

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