Please check for Asterik (*) mentioned in between under artifactory_path_pattern_system_assembly

vars:
      product_type: "Metal"
      artifactory_repo_node0: "Metal-Material/All"
      branch_node0: "check-all/gerrit"
      artifactory_path_pattern_system_assembly: >-
        {{artifactory_repo_node0}}/{{ branch_node0 }}/*/iron/{{ product_type }}
      images_file_name_pattern_system_assembly: >-
        {{ product_type }}-iron-*-side-part.tar.gz

I want the Explanation what is the role of asterik(*) in below YAML