After creating an event in the Optimizely Full Stack UI, you can either:

• Implement a Optimizely Full Stack SDK to track the event using the SDK track API OR
• Implement Optimizely Agent and track the event using the Agent API

Once you've implemented events in Optimizely Full Stack, events are always on. An event will begin sending data to Optimizely once it's implemented, even if you don't have any active running experiments.