In CSS, what does the `display` property control?

The display property in CSS plays a crucial role in determining how an element is rendered within the context of the page's layout. It defines the layout behavior, specifying whether an element behaves like a block-level element or an inline element, for instance.

When an element is set to display: block, it takes up the full width available and starts on a new line, affecting how other elements are positioned in relation to it. In contrast, elements set to display: inline only take up as much width as their content and can sit alongside other inline elements on the same line. Additionally, the display property can take values such as flex, grid, none, and more, each influencing the flow and arrangement of the layout significantly.

Understanding the display property is essential for web development since it directly impacts how web content is structured visually, affecting user experience and accessibility.