# General Data

Events are triggered to communicate between smart contract transactions and user interfaces.

By connecting DApps to Ethereum JSON-RPC API, you can listen to events to trigger specific actions. Events can be used in different ways:

1. Returning values for a user interface
2. Asynchronous triggers with data
3. A cheaper form of storage

The information is communicated from a smart contract event to a user interface via logs. Logs are helpful for debugging smart contracts and for making analytics dashboards.