Strategic SEO Migration: How Chillblast maintained visibility and increased conversions

Chillblast was operating on a legacy platform with persistent instability issues that were restricting business growth. Checkout failures and missing confirmation pages were directly affecting conversion rates and revenue, making re-platforming a necessary business decision. However, stakeholders recognised the SEO risks involved and required a solution that would support long-term growth while minimising disruption. To mitigate potential ranking losses and traffic disruptions, they engaged Door4 to oversee the migration and ensure a smooth transition.

Door4 worked closely with Chillblast’s development team to consult on critical aspects such as meta mapping, strategic redirects, structured data preservation, and comprehensive on-page audits. This collaborative approach ensured that all involved parties were aligned on objectives, reducing risks associated with stakeholder miscommunication. The focus was on reducing migration risks, preserving SEO value through precise one-to-one redirect mapping, and preparing the platform for future scalability.

Door4 devised and guided a meticulous redirect mapping strategy to ensure that every legacy URL was correlated with an optimal new counterpart. This involved comprehensive audits and rigorous testing to eliminate redirect chains and maintain link equity. Working in tandem with the client’s technical team, our experts oversaw a thorough pre-migration analysis and continuous post-migration monitoring. Stakeholders were engaged throughout, and robust performance checks were in place to detect and resolve potential issues promptly. The solution centred around preserving SEO stability by implementing effective 301 redirects and optimising crawl budget efficiency, safeguarding key elements such as metadata and structured data.

Through careful consultation and precise URL mapping, the migration achieved a robust preservation of SEO visibility. Post-migration, the site experienced an 80% week-over-week increase in organic revenue and a 131% boost in conversion rates. The project also delivered a dramatic improvement in crawl budget efficiency—from an indexed to not-indexed ratio of 1.25 pre-migration to 21.9 post-migration, representing a 17.5x improvement. Visibility increased by 19.07% and Share of Voice by 1.37%, confirming that meticulous audit and strategic redirect implementation can drive sustained business success.

The improvements in performance metrics directly contributed to superior customer experiences and higher revenue, while the strategic approach laid a resilient foundation for future growth. The project exemplifies how technical efficiency improvements can be turned into tangible business advantages, refuting the common risks associated with SEO migrations and proving that careful planning leads to measurable success.