Products/Creating a Buy Now Button
From Shopnix Help
What is Add product and Edit product?
Add product(s): Here you can add new product(s) to an existing SubCategory or a new SubCategory.
Edit product(s): Here you can edit the existing products.
Where I can access the Advanced feature?
Advanced i.e. 
button.This is generally used for if you want a BUY NOW button for the product to put on your website, email, Facebook pages, so you can paste the code in where you want to show the BUY NOW button and the customer will be directly taken to the store by clicking it.
If you have more queries or would like assistance with this please contact us on support@shopnix.in.