Hello Umashankar 

Below is some information for website routing in odoo

Example :

website_sale/templates.xml line 643 

<template id="cart" name="Shopping Cart">

So, this is the template id and the page will be localhost/shop/cart

Now, when you redirect to this page it will trigger the method of that page :

website_sale/controller.main.py line 295

@http.route(['/shop/cart'], type='http', auth="public", website=True)
    def cart(self, **post):

By the http.route you can route trigger the method of some perticuler page.

Hope that this answer will help you.

Please don't hesitate to ask any question regarding this.

If you get the answer as you need then please accept the answer.

Thank You