Moving an online store to a new e-commerce platform can solve performance, scalability and functionality problems—but migration also introduces technical and SEO risks. This practical guide explains how to plan, test and monitor an e-commerce migration while protecting important URLs, data, customer journeys and organic visibility. Migration should solve a business or technical problem, not simply follow a technology trend. A store may be ready for a platform change when its current system is limiting growth, creating operational complexity or making important improvements too difficult to implement. Performance problems become more noticeable as traffic, products or transactions increase.