What business information does AdWords use to generate dynamic ads based on a user’s past interactions with products and services on a website?

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What business information does AdWords use to generate dynamic ads based on a user’s past interactions with products and services on a website?

·         Browser cookies
·         Javascript methods
·         Dynamic attributes
·         User profiles
GA
Gaurav Arora, Digital Media Lead. 10+ years running paid media and tracking for brands in the USA, UK and Canada.