Google has just posted two new videos on its YouTube account which breaks down the setup process for transferring your data from an iPhone and familiarizing yourself with your phone. The first video is "Switching from iPhone", and explains how to prepare your iPhone for transferring data to your Google Pixel or Pixel XL. The nice lady reminds you to turn off iMessage and FaceTime, and to make sure both devices are charged to at least 50% before continuing. On the setup page, tapping on "Copy your data" will bring you to the screen that will be able to see what is on your old device...
Source: http://www.gsmarena.com/googles_new_video_shows_how_to_switch_from_iphone_to_pixel-news-21319.php