In WordPress, the position difference between “absolute” and “fixed” refers to how elements are positioned within the web page.

1. Absolute Positioning:
   • Definition: When an element is set to “absolute” positioning, it is positioned relative to its nearest positioned ancestor (an element with a position other than static) or the initial containing block if there is no positioned ancestor.
   • Behavior in WordPress: In the context of WordPress, this often means an element is positioned relative to the nearest parent container that has a specified position other than the default static. If there is no such container, it will be positioned relative to the document body.
2. Fixed Positioning:
   • Definition: When an element is set to “fixed” positioning, it is positioned relative to the browser window or the viewport. It stays in the same position even when the page is scrolled.
   • Behavior in WordPress: In WordPress themes, fixed positioning is commonly used for elements like navigation bars or headers that should remain visible at the top of the screen while users scroll down the page.

In summary, the key distinction lies in whether the positioning is relative to an ancestor container or to the viewport. “Absolute” positioning is relative to the nearest positioned ancestor, while “fixed” positioning is relative to the viewport, providing a fixed position on the screen even during scrolling.