When arranging items in a flex container, controlling the space between them is crucial for clean, readable layouts. The gap property offers a modern way to create consistent spacing between flex items, directly on the container.

Unlike using margins on individual items, which can lead to uneven or doubled spaces at the edges, gap ensures that spacing only appears between items, not before the first or after the last. This property is applied to the flex container, not the items themselves, and works in both row and column directions.

Using gap in your flex layouts, as shown above, brings several benefits compared to adding margins to each item. With gap, you avoid the hassle of removing margins on the first or last items, keeping your code cleaner and your spacing more predictable. It also automatically adapts when your layout direction changes, such as switching from rows to columns. This makes your CSS easier to maintain and your layouts more consistent across different scenarios.