Having an I-130 Checklist for Stepchild is important because it provides guidance to those seeking to petition a stepchild for immigration. This checklist outlines all of the documents that need to be included in the application, including evidence of the relationship between the petitioner and stepchild, proof of financial support, and other relevant information needed by the USCIS. Additionally, the checklist can be used to ensure that all of the requirements for visa eligibility are met and to avoid any delays in processing the application.