Bullet charts display performance of a variable as a horizontal bar compared to a target or goal, represented by a vertical line. For example, a bullet chart could show whether the actual sales for a given period(s) are above/ below target sales. The performance measure (horizontal bar) overlays several shaded rectangles that represent qualitative ranges (e.g., 40% to the target goal, to indicate the performance progress).
Sosulski, Kristen. Data Visualization Made Simple (p. 47). Taylor and Francis. Kindle Edition.