What is the primary use of the 'box-shadow' property in CSS?

The 'box-shadow' property in CSS is primarily used to add shadow effects around an element. This property allows designers to create a sense of depth and dimension on a web page by specifying various attributes of the shadow, including its horizontal and vertical offsets, blur radius, spread radius, and color.

When applied, the 'box-shadow' can enhance the appearance of blocks, such as buttons or cards, making them stand out from the background. It offers developers a simple way to create visually appealing elements without the need for additional images or effects, contributing significantly to the overall user experience and interface design.

Other options, while related to CSS, serve different purposes; borders define the edges of an element, margins create space around elements, and background colors fill in an element's background. Each has its unique function within the CSS framework, but they do not specifically address the shadow effect that 'box-shadow' provides.