Timeline is a visual representation of your application runtime.
Clockwork will automatically add some default events, but you can also add custom ones.
To add a custom event to the timeline, you'll need to start an event with an unique name and description first:
clock()->startEvent('twitter-api-call', "Loading user's latest tweets via Twitter API")
After executing the tracked block of code, you can end the event, using it's unique name.
Events that are not stopped explicitly will simply finish when the application runtime ends.