Stars are a great way to access favorite places quickly, from any computer or from your mobile phone. To 'star' a place, click on the star outline next to its name in Maps search results, or in its info window on the Map. View all the places you've starred under 'Starred items' on the 'My Places' tab.
You have access to your starred items wherever you're logged in with your Google account. On your mobile phone, view your starred places on the 'Local' tab of Google Maps.