Retrieve UTM Parameters

Hello,

I have google and facebook paid campaigns running in my website. The website is built in Webflow and there is popup and one landing page built in Unbounce.

When the users land to the landing page (Webflow pages) via ads, there are utm parameters for google & facebook ads. However, once they click on any other page, the utm parameter is lost. How can I make sure that the utm parameters in the url is always present?

Also, there is a page built in Unbounce and when a visitor visits the website and then goes to this page, the utm parameters is lost again. How can I retrieve the utm parameters in this url?