Viral loops refer to a marketing strategy where a business or product is designed to encourage users to invite other users, who in turn invite even more users, creating a "loop" of exponential growth. This type of growth is often called "viral" because it spreads rapidly, much like a virus.

The concept of viral loops is often used in the context of social media platforms, mobile apps, and other digital products or services. In these cases, users are encouraged to share the product with their friends or followers, which can help the product gain traction and grow quickly.

There are several ways to create viral loops, including offering incentives to users for inviting their friends, creating viral content that is shareable, and leveraging social proof to encourage others to try the product. The goal is to create a self-perpetuating cycle where each new user brings in more users, resulting in rapid growth and increased engagement with the product.