Description : Purpose and usage of `@content` in SASS mixins.
Answer :
`@content` is used inSASS mixins to include a block of code that is passed to the mixin. This allows for more flexible mixins that can accept arbitrary styles. For example:`@mixin flex-container { display: flex; @content; }` can be used with`@include flex-container { justify-content: center; }` to apply additional styles inside the mixin.