I don’t have all the answers, and this isn’t a comprehensive account of the 2016 race. That’s not for me to write—I have too little distance and too great a stake in it. Instead, this is my story. I want to pull back the curtain on an experience that was exhilarating, joyful, humbling, infuriating, and just plain baffling.
-- Hillary Clinton (Author's Note paragraph 5)

Importance: This describes Clinton's perspective and motivation in writing this book. She argues that her account of the election is incomplete, but valuable.

I will confess that the day was bittersweet. For years all over the world, I had seen women driving grassroots movements, assuming power for themselves and their communities, forcing warring armies to the peace table, rewriting the destinies of nations. Were we now seeing the stirrings of something similar in the streets of our own country? It was awe-inspiring, as I said on Twitter at the end...
-- Hillary Clinton (chapter 1 paragraph 5)