So I just started using YAML file instead of application.properties as it is more readable. I see in YAML files they start with ---. I googled and found the below explanation.
YAML uses three dashes (“—”) to separate directives from document
content. This also serves to signal the start of a document if no
directives are present.
Also, I tried a sample without --- and understood that it is not mandatory to have them.
I think I don’t have a clear understanding of directive and document. Can anyone please explain with a simple example?