this didnot work for me .. donot know what i am missing

How would this work for variants? 

Hi,

To display the internal code (SKU) under the product name on your Odoo website, follow these steps:

1) Activate developer mode and Go to Technical > User Interface > Views.
2) Search for the key 'website_sale.product'.
3) Open the appropriate view template and place the default_code in the desired location. For example:

<p t-if="product.default_code">
    <span t-esc="product.default_code"/>
</p>

Save your changes, and the SKU will now display under the product name on your website.

Hope it helps