How to click on a specific element of the site using userscript?

Question

JavaScript

I need to click on an object flying from the top of the screen. Can you explain what I need to use to send a click to the desired element(document.getElement....click()). And in parallel with the first explanation, explain how such elements usually work, how to find them, exactly those that need to be clicked on in order for the item to work.

<div class="b-falling-gifts__item" style="left: 26%;"><div class="b-falling-gifts__item-inner"><div><div class="b-falling-gifts__gift"><!-- react-text: 992 -->0.01<!-- /react-text --><span class="b-falling-gifts__unit">р</span></div><div class="b-falling-gifts__gift2"><!-- react-text: 995 -->0.01<!-- /react-text --><span class="b-falling-gifts__unit">р</span></div></div></div></div>