You can configure the page title, page description, Google Analytics tracking code or any other tracking code script you need in the visualization Settings section.

To know how to get the google analytics code please read: https://support.google.com/analytics/answer/1032385?hl=en

Be aware these settings only apply to web landing visualizations that use a Custom Domain. If you're using the embed version you should add all these configurations in the web page that is embedding your visualization.