How do I create a sub-category landing page on my website?

[Moumita]

Basically, I already created a menu with all category and sub-category. I want to create a sub-category landing page on our website.

For example, this website has category landing page

and sub-category for every category:

.

This is my website:

and menu is 

[AvadaCommerce]

Hi @Moumita 

You can follow this guide to create a page of collections or a subset of collections. 
This tutorial uses the Supply Theme to create a Subset of Collection on a page in Shopify, but the principle will work on other themes. You can use existing code within the theme with minor changes for your custom page.

If you feel like my answer is helpful, please mark it as a SOLUTION. Let me know if you have any questions!