To enable free shipping in WooCommerce, go to WooCommerce → Settings → Shipping → Add Shipping Zone, then add a Free Shipping method and set conditions like minimum order amount or coupons. To integrate USPS, install a plugin such as WooCommerce USPS Shipping Method or Flexible Shipping for USPS. These plugins allow real-time shipping rates, tracking, and label printing. After installation, configure your USPS API credentials and shipping options in the plugin settings. This setup helps automate shipping costs and improves checkout accuracy for customers using USPS or other carriers.
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