Mastering Magmi: The Complete Guide to Mass Import in Magento
Step by step: installing Magmi, your first import, profiles, plugins, cron and the usual pitfalls.
CSV vs JSON in Magento: Which to pick for 1M SKUs
Which format is faster, easier to edit, friendlier to UTF-8 and produces fewer errors at scale.
Magento 1 → 2: A detailed 42-point migration plan
Migration checklist: database, custom modules, theme, URL rewrites, images, orders, customers.