"Crowdsourcing" is an appealing new option for marketers who want to spread their advertising messages through low-cost peer-to-peer channels. Enthusiasts can be recruited to become brand advocates for products that they love, spreading the word through their social networks, Facebook friendships and Twitter streams. Contests are an increasingly popular means of leveraging customer creativity to build grassroots campaigns. This presentation from a PRSA webinar features examples of successful customer-generated advertising promotions in both business-to-consumer and business-to-business contexts. Attendees learned: Appropriate scenarios for applying crowdsourced promotion How to generate ideas that spur customer creativity Low-cost incentives to build participation Basics of measuring results