Where will my Google Ad remarketing campaigns appear?

As a highly flexible advertising strategy, a remarketing campaign can appear to your site visitors when they leave your site and continue browsing. Retargeted ads are displayed on Google’s Display Network - which exists outside of Google search. 

The Display Network includes millions of websites that your customers visit every day. From browsing their Gmail to downloading apps, checking social media and banner ads on their bookmarked sites, you can promote your business with relevant ads that generate exposure and drive real-world sales.