This document discusses retargeting and real-time bidding (RTB) for digital advertising. It begins with an overview of retargeting and the importance of using a media mix of pay-per-click (PPC), display, and retargeting advertising. It then discusses how to approach retargeting using a "buying circle" approach of introducing, building trust, reminding, and converting customers over 21 days using a full media mix. The document also covers RTB basics, how RTB works through demand and supply-side platforms in real-time auctions, campaign strategies, pricing, targeting options, an RTB case study in Slovakia, and European and CEE market predictions for RTB growth. It