What type of data is recommended to use when employing buffered channels for process synchronization?

When using buffered channels in Go for process synchronization, it is recommended to use a data type that transmits a signal or state, rather than large amounts of data. Often, an empty struct struct{} is used — it occupies 0 bytes and serves to transmit an event or signal.

Example:

ch := make(chan struct{}, 1) // buffered channel

// send signal
ch <- struct{}{}

// receive signal
<-ch

This approach is efficient for synchronization, for example, to notify about task completion or resource readiness.