현재 페이지/단계/위치/시간/등등을 나타낼 수 있는 어트리뷰트이고 대략 이런 느낌이다.

<ul>
<!-- ... -->
  <li aria-current="page">
    <a href="">link</a>
  </li>
<!-- ... -->
</ul>

<ul>
<!-- ... -->
  <li aria-current="page">
    <a href="">link</a>
  </li>
<!-- ... -->
</ul>

다양한 걸 다룰 수 있음:

• page: Represents the current page within a set of pages such as the link to the current document in a breadcrumb.
• step: Represents the current step within a process such as the current step in an enumerated multi step checkout flow .
• location: Represents the current location within an environment or context such as the image that is visually highlighted as the current component of a flow chart.
• date: Represents the current date within a collection of dates such as the current date within a calendar.
• time: Represents the current time within a set of times such as the current time within a timetable.
• true: Represents the current item within a set.
• false (default): Does not represent the current item within a set.

mdn