The Wheel of Time books are an intricate, many-layered narrative covering an entire world over the course of several years (and many centuries, in flashbacks). As such, there is much information covered in each book; some of it reveals secrets that impact earlier information, and can change the way you view characters and events at the time.
For that reason, we have included Spoiler warnings at the beginning of relevant pages or sections of pages, if information therein will not be revealed until very recent book (currently A Memory of Light). If you do not wish to know more information ahead of time than the author chooses to reveal, you may want to stop reading that page and come back to it after you have completed that book.