Glew groups product data on a product ID level. If you switch ecommerce platforms, it's important to make sure your product IDs are mapped correctly to ensure that product performance data carries over to your new platform. If product IDs in your new ecommerce platform do not match the product IDs you used in your previous platform, it can cause gaps or discrepancies in your historical data.
Typically, your products will receive new product IDs when you migrate to a new ecommerce platform. In order to map them correctly, you have two options:
1. Match your new product IDs to your old product IDs. You can do this when you upload products to your new ecommerce platform - just make sure you include the existing product IDs. This is what we recommend doing.
2. Match your old product IDs to your new product IDs. If you choose this option, you will need to use the new product IDs assigned when you upload your products, and also go back and attach those new product IDs to all historical order items in order to capture your historical data. We do not recommend this option, as it requires more work and can lead to data gaps and discrepancies if done incorrectly.
Please remember to always use your (old and new) ecommerce platforms for guidance when migrating data - they will be the best sources for specific information and best practices. Learn more about safely migrating ecommerce platforms.