In Odoo, the breadcrumb navigation is not included as a standard feature in the website builder. However, there are several third-party modules available in the Odoo App Store that can provide this functionality. 

One such module is the "Website Breadcrumb" https://apps.odoo.com/apps/modules/13.0/website_breadcrumb/ This module adds a dynamic breadcrumb navigation to your Odoo website pages based on the page hierarchy. It also allows you to customize the breadcrumb style and behavior.

To install the "Website Breadcrumb" module, you can follow these steps:

Go to the Odoo App Store and search for Website Breadcrumb.

Click on the "Install" button to install the module in your Odoo instance.

Once the module is installed, go to your website page and edit it using the website builder.

In the website builder, click on the "Add a new block" button and select "Breadcrumb" from the list of available blocks.

Customize the breadcrumb style and behavior as per your requirements.

Save the changes and publish the website page.

With the "Website Breadcrumb" module installed, your Odoo website pages will have a dynamic breadcrumb navigation that makes it easier for your visitors to navigate your website.

Many thanks for your help. I saw this module, but wasn't sure if it's actively developed and recommended.

Thanks a lot.