Influencers are creators who have built engaged audiences on social platforms. They can drive awareness, trust, and sales for brands. Influencer tiers: - Nano (1K-10K followers): Highest engagement - Micro (10K-100K): Good balance of reach and engagement - Macro (100K-1M): Significant reach - Mega (1M+): Maximum reach, lower engagement Compensation models: - Flat fee per post - Performance/commission based - Product gifting - Hybrid (fee + commission) Best practices: - Align with brand values - Give creative freedom - Track with unique codes/links - Build long-term relationships