A custom greeting allows you to personalize your callers’ experience so that they know they've called the right place. You can use a custom greeting in any of your call flows, in an auto attendant, or in your personal user profile when callers are sent to your voicemail.
In Tresta, custom greetings are more generally called "Audio Files". You can upload or record any audio file to your account and use them throughout your system. Learn more about audio files here.