Influencer marketing is a form of social media marketing involving endorsements and product placement from influencers, people and organizations who have a purported expert level of knowledge or social influence in their field.

Types of influencers:

• Nano-influencers (1,000-10,000 followers)
• Micro-influencers (10,000-100,000 followers)
• Macro-influencers (100,000-1 million followers)
• Mega-influencers (1 million+ followers)

Key benefits:

• Leverages trust between influencers and their followers
• Can provide access to niche markets
• Often seen as more authentic than traditional advertising
• Can boost brand awareness and credibility

Challenges:

• Measuring ROI
• Ensuring alignment with brand values
• Navigating disclosure requirements
• Managing relationships with influencers

Influencer marketing has become increasingly popular, especially in industries like fashion, beauty, lifestyle, and technology. It's particularly relevant for platforms that connect brands with influencers or affiliate marketers.