Analysis properties
We recommend you define analysis properties in your analyses/ directory, which is illustrated in the analysis-paths configuration. Analysis properties are "special properties" in that you can't configure them in the dbt_project.yml file or using config() blocks. Refer to  Configs and properties for more info.  
You can name these files whatever_you_want.yml, and nest them arbitrarily deeply in subfolders within the analyses/ or models/ directory.
analyses/<filename>.yml
version: 2
analyses:
  - name: <analysis_name> # required
    description: <markdown_string>
    docs:
      show: true | false
      node_color: <color_id> # Use name (such as node_color: purple) or hex code with quotes (such as node_color: "#cd7f32")
    config:
      tags: <string> | [<string>]
    columns:
      - name: <column_name>
        description: <markdown_string>
      - name: ... # declare properties of additional columns
  - name: ... # declare properties of additional analyses
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