WooCommerce may be easy to use but as you add more products, making bulk changes becomes time consuming. The PW WooCommerce Bulk Edit extension is designed to help you update your simple products and variations quickly. You can search/replace, append, prepend, and do wildcard searches through your store.
The PW WooCommerce Bulk Edit plugin gives you the opportunity to undo changes and also shows you what you are about to change before you hit save. You can change product name, description, SKU, price, stock status, quantity, tax status, catalog visibility, and a whole lot more.
The pro version of this plugin lets you create new variations, edit more fields, save/load filters, and use Regular Expressions. You can download the free version here.