Front matter YAML is a tool used to create a structured front matter for websites. It is typically used in conjunction with a static site generator.
Front matter YAML consists of a set of key-value pairs that specify the website's metadata. This metadata can include the website's title, description, author, etc.
The front matter YAML syntax is very similar to that of JSON. However, it is not as strict as JSON, and allows for comments and other non-standard features.
Front matter YAML is often used to create a "data file" that can be used by the static site generator to populate the website's content.
There are many front matter YAML tools available, and the specific tool that you use will depend on your needs.