Building community

Do you have any experience building a community of your most loyal users as a product manager?

Community building can be somewhat of a challenge for those new to it. It requires patience, dedication, and a true focus on your customers. Boosted sales and increased profits should only be a welcome side-effect. In most companies, community building is something the marketing team does. But I think it's equally essential for the product team. One of the main benefits is having a short feedback loop with your users. What is your opinion? Do you have any experience creating and managing a community as a PM?