Question: I am new to nopCommerce and trying to make HTML to theme on it I googled lots of things but not able to get proper way to create customized theme nopCommerce, can any one help,

Thanks in advance

Answer: 
In addition to the Designers guide there are some nice articles describing why and how to use nopCommerce themes:

[Why nopCommerce Theme?](https://www.nop-templates.com/why-nopcommerce-themes)

[How to create nopCommerce themes](http://www.nop-templates.com/blog/12/how-to-create-nopcommerce-themes)
Copy all the files inside `~/Views` to your Themes: `~/Themes/YourTheme/Views`

Then just modify any `.cshtml` file inside.

I hope it helps!