Actually there is not much to say about it: It is a feature that many users appreciate. Giving you an immediate context of where an account is located can help you with all the side – but most important – tasks that are not processed by software, or stored in a data base
For example, if you travel a lot to your customers it helps you to quickly see where they are, how close to each other, and what this could mean for your travel route, or meeting schedule. Looking at a map is much clearer for doing this, instead of looking at a list.
In case you are interested in applying such functionality in SAP CRM check out SAP Note 2104728.