What is a YAML file and when should we use it? [duplicate]

No context was given, but if you are talking about YAML is a serialized data format that we can say is a competitor of the JSON . It is simpler and more economical.

You can use it whenever you feel it meets all your needs. Usually it's a good substitute for JSON. But I would not use it in external things because many people will not know or will not have access to this format. JSON and XML have become universal standards, not YAML. But overall I like him more. It does not have a specific criterion to adopt it in internal things that will not have to communicate with anything that you do not have control.

The fact that fewer people use makes it harder to find information and help, but it is also a mouse to need.

Although simpler it is offers more than the JSON. A little less than XML that is extremely complex.