Emerging trends in digital marketing include: 1) Search marketing is for engaging those already seeking a specific service, while social media aligns brands with new customer intents and spreads through peer recommendations. 2) Digital marketing spending is growing as customer behavior shifts online, requiring brands to communicate where consumers now engage. 3) Key areas for investment are social media, digital experiences, and maintaining optimized websites that integrate across channels. 4) Unpaid advertising through personal referrals is growing in influence over direct brand messages.