Potential buyers will always be skeptical about your product or service until you've satisfactorily convinced them. So while it's wise to perfect your marketing strategies and craft engaging brand awareness content, testimonials are the most effective way to build trust with new customers. Research shows that business websites that regularly use word of mouth from delighted customers have the potential of generating 62% more revenue from each of their customers on every visit. Although you can use written reviews, video testimonials are more engaging.