Hi Pankaj Bhandarkar!
First please chose “Settings -> WooCommerce Custom Tabs” menu in the WP Admin area, and enter your desired tab name into the ‘Name of your tab’ field.
Then you should define tab content for every specific product. Go to the edit pages of your WooCommerce product, you will find two more fields, please enter the desired data into them:
Lite tab tab custom title (optional) – You can enter a custom content specific for this product, or leave it empty for displaying the default tab name, given in the settings page
Lite tab content – You should enter the content of your tab pages of the specific product into this field.
Have you done these settings? Please let us know if you check the settings above and the tab content does not appear on your site.
You can find more details in the plugin home page, on the Documentation tab:
https://webshoplogic.com/product/woocommerce-custom-tabs-lite-plugin/
Best Regards,
Peter Rath
WebshopLogic