Building a relationship with your audience can take many forms. You can send ads, put up posters, and offer discounts to encourage engagement. The challenge is getting your customers to consistently engage with something they cannot actually use. Flashy design and different sized mailers only go so far; sometimes you need to get them something they can hold and take with them every day. Promotional products have a proven ROI, and one of the best examples of this is consistently the personalized pen.