Website migration is the process of transferring a website from one platform or hosting environment to another. It starts with planning and assessing the current site, backing up all files, and exporting content. The next steps involve rebuilding or adapting the design on the new platform, setting up CMS and database elements, and optimizing for SEO. After testing the new site for responsiveness, functionality, and compatibility, it undergoes client review and final adjustments. The site is then launched by connecting the domain to the new platform, followed by a period of monitoring and post-launch support to ensure everything runs smoothly.