A lookalike audience contains people an advertising platform considers similar to an existing source group. Google calls that source a seed list, such as customers or people who interacted with a website.[1] The aim is to identify other potential people, not simply advertise again to the identical list.
The seed determines which kind of similarity is being sought. Recent purchasers represent a different starting point from all visitors. Check whether the platform treats the segment as a firm constraint or an expandable signal. Similarity guarantees neither buying intent nor compliance with permission and data-use requirements, and it must still be assessed against actual outcomes.
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Compiled with AI assistance using public sources. General explanation, not individual legal or tax advice. Describing a concept does not mean Zoloo offers it as a feature.