People with engaged audiences can shape the choices of their followers. Influencer marketing is the practice of partnering with those individuals to promote products or services. The influencer creates content that features the brand, often in a style consistent with their usual posts, and is compensated with payment, free product, or both.

Effectiveness depends on the fit between the influencer’s audience and the brand’s target customers, and on the authenticity of the endorsement. Micro-influencers with smaller but highly engaged followings sometimes outperform celebrities with massive but less attentive audiences. Disclosure of the commercial relationship is required in most jurisdictions and is increasingly expected by audiences.

Brands measure results through engagement, referral traffic, coupon redemptions, and brand-lift studies. The channel has grown rapidly with social media, yet it remains vulnerable to fraud, changing platform algorithms, and audience skepticism. When the partnership is genuine and the product is relevant, influencer marketing can reach people in a context of trust that traditional advertising struggles to match.