The primary purpose of a peer-reviewed scientific journal is to ensure the quality and integrity of scientific research before it is published. This process involves experts in the relevant field reviewing articles for methodological rigor, validity of results, and adherence to ethical standards. By subjecting research to critical evaluation, journals facilitate the dissemination of reliable knowledge and advance the scientific community. Peer review helps filter out flawed studies, fosters accountability among researchers, and ultimately enhances trust in published findings, contributing to the cumulatively growing body of scientific literature.