You can see the tabs in the WooCommerce product widget (where you can make your product) It is the last tab. The name is ‘Custom Tabs’ When you add there custom tab; ‘Add a Tabb’ or ‘Add a Saved Tab’. Then you saved the product and the product with te custums tabs are vissible at the productpage. When you want’s to go to edit this product and you’ll go to the tab ‘Customs tabs’ and click on it then the tabs that you had saved earlier are dissapear….. strange is’n it???