When I generated an app from <start.ktor.io> I did...

# ktor

[Manas Marthi]

When I generated an app from start.ktor.io I didn’t see application.conf file. Is it optional? In what scenario I would need it

[Aleksei Tirman [JB]]

Yes, it's optional. You would need if you want to store the server configuration in an external file. For more information please read the documentation.