What does Element Click really do?

I can't figure how element click can be used for website navigation. How to make it actually Click.

The idea of a "click" it to click on element so that a new page or new content is loaded. This is not how element click works, as it seems that after the click the DOM is not updated with new content.

For example: on website (https://www.woolworths.com.au/), how to

  1. click on navbar "Fruit & Veg" to load the left menu
  2. on the newly loaded left menu click "Vegetables" to load the submenu
  3. on the newly loaded submenu select "Show All Vegetables" to load products page.
  4. Finally capture product name text for all products in the page and also all Next pages.