How long will a website retargeting audience take to build, on average? By vmartinez How long will a website retargeting audience take to build, on average? Once you reach 300 members, it will depend on your website traffic Less than 24h Less than 48h Related content Related questions:Customer lists, Engagement retargeting, and Website…An advertiser is setting up a catalog sales campaign…When using a Lookalike Audience to build brand…How many website visitors do you need to activate a…