The good news is that it only covers the people, locations, and events seen in the episodes so far, so there are no dangers of spoilers if you are just looking for a bit of clarity. It is free to check out even if you don't have Amazon Prime, which means you can watch The Wheel of Time if you want.
There are brief bios of the eight main characters, of course, but there is also a map of the places seen so far on the series, as well as a timeline of the events of each episode. The most extensive resource is a compendium that explains the relationship between the Pattern of Fate, the Ta'veren who can alter it, and the Wheel that weaves it. If you have read the original fantasy books, it is unlikely that any of this information will be new to you. Unless you took extensive notes while watching the show, you can get something out of it.
Via [CBR]
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