Sales funnels are right for businesses that rely on a high degree of prospect interaction and engagement to make sales or close deals. Their sales process may be long and complex or they may be selling a high-ticket item that requires a lot of consideration by the customer. Both business-to-business (B2B) and business-to-consumer (B2C) businesses use sales funnels.

Affiliate marketing is commonly confused with referral marketing, as both forms of marketing use third parties to drive sales to the retailer. The two forms of marketing are differentiated, however, in how they drive sales, where affiliate marketing relies purely on financial motivations, while referral marketing relies more on trust and personal relationships.[citation needed]
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