This section shows you the number of products which are out of stock in your competitors and your own store. It does not show how many URLs are not in stock, only the product count. You can click on them to view a list of out of stock products. Also, please note this, the products that are not in stock, they will not be included in excel report, position calculation and also SmartPrice calculation by default. You can change this from the preferences tab under your settings page. Here is more information about changing this setting.
This video is for you to have a better understanding of our dashboard page!