Identify the peaks, which are the bins that have the most dots. The peaks represent the most common values in the sample. Assess the spread of your sample to understand how much your data varies.
For example, in the following dotplot of customer wait times, the peak of the data occurs at about 6 minutes. The data spread is from about 3.5 minutes to 8.5 minutes.
Investigate any surprising or undesirable characteristics on the dotplot. For example, the dotplot of customer wait times showed spread that is wider than expected. An investigation revealed that a software update to the computers caused instability and delays in customer wait times.