Have you ever tried to do four things at the same time on your mobile google maps and failed miserably as a result of its "one-tracked mind"? You may search for a restaurant but when you work out the directions, you think about searching for a close petrol station along the way, suddenly your customised directions are gone! You pull over to the side of the road and start again...
You may have gotten used to using customised maps on Google Maps and creating your own "world" which shows favourite restaurants, friends' houses, places you want to go etc. Well now with the latest Google Maps for mobile you can see these customised maps when you are using your mobile phone!
Read more here.