When you're ready to migrate your WooCommerce store from one WordPress site to another, it's crucial to know what elements need to be exported. Here are the top five components you must ensure to migrate:

1. Customer Data
Your WooCommerce user database is invaluable. It includes customer contact details, emails, delivery addresses, and purchase history. Ensuring this data is transferred accurately is essential for maintaining continuity in customer service and marketing efforts.

2. Product Information
The core of your store is its product listings. This includes product descriptions, IDs, images, and any multilingual translations if applicable. Ensuring that all this information is accurately transferred will help prevent any disruptions to your store's operations.

3. Order Records
Each order represents a vital part of your business history. It’s important to export comprehensive order details, including payment methods, transaction histories, shipping addresses, and tracking information, to maintain service continuity and customer trust.

4. Website Content
Beyond products, your eCommerce site includes various pages, blog posts, categories, tags, customer reviews, coupons, videos, and images. Migrating all this content ensures that your site retains its SEO value and provides a seamless user experience.

5. Essential Plugins
Plugins play a critical role in the functionality and customization of your WordPress site. Make sure to transfer all necessary plugins and their data to maintain the same level of service and features on your new host.

WooCommerce Migration Checklist
Migrating a WooCommerce site involves many detailed steps, much like relocating a physical store, but online and using a WordPress migration plugin. To ensure a seamless transition, follow this comprehensive checklist:

1. Clear Migration Plan
Do you have a detailed migration strategy? A successful migration starts with a well-defined plan. Outline each step of the process, including preparation, data export, site configuration, and final launch. Your plan should also address potential challenges and include contingency strategies. Make sure to set clear timelines and responsibilities to keep the migration process on track.

2. Content Inventory
Have you cataloged all existing content? Before migrating, create a thorough inventory of all content that needs to be moved. This includes product listings, blog posts, pages, media files (images, videos), and any other site-specific content. Ensure that you have a complete list and that nothing is overlooked, as missing content can disrupt your site’s functionality and user experience.

3. New Site Optimization
Is the new site designed for optimal performance? Ensure that your new site is optimized for performance right from the start. This involves setting up a suitable hosting environment, configuring caching and content delivery networks (CDNs), and ensuring that the site is responsive and fast-loading. Check that the new site is compatible with all plugins and themes used on the existing site.

4. Secure Backup
Is your data backed up securely before starting the migration? A secure backup is crucial to protect against data loss during migration. Make sure you have a complete backup of your existing site, including databases, files, and media. Verify that the backup is stored in a safe location and is easily accessible should you need to restore it.

5. Data Migration Plan
What is your strategy for transferring data to the new site? Develop a detailed plan for migrating data, including user accounts, product information, orders, and other critical elements. Decide whether you will use automated tools, manual processes, or a combination of both. Ensure that the data migration plan includes steps for verifying data integrity and consistency post-migration.

6. Plugin and Tool Connections
Have you reconnected all essential plugins, email systems, and other tools? Ensure that all plugins and tools used on your current site are installed and configured on the new site. This includes any custom plugins, email marketing integrations, analytics tools, and other third-party services. Verify that all tools are functioning as expected and that settings have been correctly migrated.

7. Post-Migration Testing
Have you conducted thorough testing to identify and fix any issues? After migration, perform extensive testing to ensure that everything is working correctly. Check for broken links, missing content, and functionality issues. Test the checkout process, payment gateways, and other critical features to confirm that they are operating smoothly. Address any issues promptly to avoid disruptions for your users.

8. Official Launch Plan
When will you officially launch the new site? Plan your official launch date and communicate it to all relevant stakeholders. Ensure that you have a plan in place for switching DNS settings, updating any links or references to the old site, and managing the transition to avoid downtime. Consider a soft launch or beta testing phase to gather feedback before the full launch.

9. Customer Communication
How will you inform your customers about the migration? Effective communication with your customers is key to a smooth transition. Inform them about the migration process, any potential downtime, and any changes to the user experience. Use multiple channels such as email, social media, and on-site notifications to keep your customers updated and to manage their expectations.

10. Performance Monitoring
What measures will you put in place to monitor the new site’s performance? After the migration, continuously monitor the performance of your new site. Set up analytics tools to track key metrics such as site speed, user engagement, and conversion rates. Regularly review performance reports and be prepared to make adjustments as needed to optimize the site’s performance and address any emerging issues.

Note on Domain or Branding Changes
If you are only changing your domain or rebranding your eCommerce site, you simply need to update your server settings to point to the new domain, update your branding, and make necessary adjustments to the business name. This type of change doesn’t require a full migration, but rather a series of targeted updates.