Add Google reviews to WooCommerce

WooCommerce runs on WordPress, but its product screen does not use the block editor — products open in the classic editor, with a Product description box that has a Code tab. That tab is where the snippet goes. For every product at once, the Single Product template in the Site Editor is the block-editor route.

Two naming details, so you are not thrown by what you read elsewhere. WordPress renamed that editor tab from Text to Code in version 6.8, and parts of WooCommerce's own documentation still call it Text — it is the same tab. And WooCommerce did briefly ship a block-based product editor: it was deprecated in 10.1 and removed from core in 11.0, so on a current install the classic editor is the only one. If your store is still on 10.x with that beta switched on, your product screen will look different from the screenshots here.