The 'Good to know' widget shows insights on three different levels: timing, location, and gender and age. You can switch between the three levels on the right side of the widget. The timing shows the best hour to publish and what the best publish day and week were. Location shows where your fans are from in a map, numbers, and percentages. Last but not least, 'Gender - Age' shows you the gender and age of your fans. I know, surprising right?