What is a viral loop?

Viral loop — is a mechanism in a product or service that encourages users to invite new users, creating a growth cycle.

Example: a user registers in an app, receives a unique referral link to invite friends. Each invited friend, upon registering, also gets such a link and invites further. This leads to exponential growth of the audience.

Key elements of a viral loop:

• Motivation to invite: bonuses, discounts, additional features.
• Ease of sharing: convenient tools for inviting.
• Value for new users: so they want to stay and invite further.

Viral loop helps to quickly scale a product with minimal marketing costs.