Digital advertising and promotion uses various digital tools to market and promote brands to consumers. These tools include sponsorships, referrals, email marketing, viral marketing, electronic word-of-mouth, and mobile marketing. Sponsorships allow brands to reach mass and targeted audiences without waste by financially supporting events or causes relevant to the brand. Referral marketing encourages customers to promote brands through their trusted networks. Email marketing effectively builds large email lists and sends engaging content to move people to purchase. Viral marketing uses content that users want to share with others to exponentially grow awareness. Mobile marketing provides personalized, location-based promotions through apps, ads, and SMS.