Add tags to your markdown files

You add tags by defining them in the frontmatter of your Markdown file. The frontmatter is the area at the top surrounded by dashes that includes post data like the title and date.

---
title: "A Trip To the Zoo"
---
I went to the zoo today. It was terrible.

Fields can be strings, numbers, or arrays. Since a post can usually have many tags, it makes sense to define it as an array. Here you add your new tags field:

---
title: "A Trip To the Zoo"
tags: ["animals", "Chicago", "zoos"]
---
I went to the zoo today. It was terrible.

If gatsby develop is running, restart it so Gatsby can pick up the new fields.