This is the 1420th most frequent Arabic word.
عليها
"Upon it" or "on it."
Here, 'عليها' functions as an impersonal obligation indicating something that she is required to do.
عليها أن تحضر الاجتماع في الوقت المحدد.
She must attend the meeting at the specified time.
In this sentence, 'عليها' is used to refer back to 'معلومات', indicating a semantic connection implying 'to review it'.
هذا الكتاب يحتوي على معلومات مفيدة جدًا، يجب عليك الاطلاع عليها.
This book contains very useful information; you must review it.
Here, 'عليها' directly refers to the surface of 'الطاولة', describing the spatial relationship.