As you saw in the previous chapter, in Kotlin it is very easy to introduce concurrency:

fun getName() = async {
   delay(100)
   "Ruslan"
}

But that concurrency may be unexpected behavior to the user of the function, as they may expect a simple value:

println("Name: ${getName()}")

It prints:

Name: DeferredCoroutine{Active}@...

Of course, what's missing here is await():

println("Name: ${getName().await()}")

But it would have been a lot more obvious if we'd named our function accordingly:

fun getNameAsync() = async {
   delay(100)
   "Ruslan"
}

As a rule, you should establish some kind of convention to distinguish async functions from regular ones.