Why there are two origin in defining xacro:macro link

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Hi, I am following the tutorial about urdf. In example 08-xacro, I don't understand why when defining the xacro:macro for a link/visual tag, there are two origin tags before and after geometry tags.

  <visual>
    <origin xyz="0 0 0" rpy="${pi/2} 0 0" />
    <geometry>
      <cylinder radius="${wheeldiam/2}" length="0.1"/>
    </geometry>
    <material name="black"/>
    <origin xyz="0 0 0" rpy="0 0 0" />
  </visual>

Thank you very much for your help.