The "AR: Buy GTIN/UPC Barcodes" app is an essential tool for businesses looking to optimize their product listings on platforms like Google Shopping. By purchasing unique GTIN13 barcodes, also known as EAN, UPC, or ISBN codes, sellers can enhance their product visibility and approval rates on e-commerce platforms. While these barcodes are not brand registered and may not be compatible with certain marketplaces like Amazon or Bol, they are a valuable asset for other platforms, requiring no annual renewal. The app simplifies the process by providing 10 test barcodes to ensure compatibility and by automating the integration of new GTIN barcodes into product listings. These barcodes are effective for improving product performance and visibility without the hassle of manual updates. For those needing GTIN14 numbers, simply add a zero in front of the GTIN13 codes.