The Top List visualization in Datadog ranks infrastructure components by metric values, highlighting the most heavily loaded hosts, fullest disks, or pages with worst latency. This tool helps identify and solve problems within an infrastructure. It can be used to monitor specific application versions or customer types by creating custom tags. The ranking is based on metrics like load, memory use, or custom app metrics. Top Lists work well in screenboards for easily digestible information sharing and as a complement to timeseries or heatmap graphs.