Have a favourite spot in the park nearby where you like to sit and read? Want to add locations to your map that aren't in Google's database? The latest version of Maps for Android lets you give any place a custom name, so you can search for it later.
That means you can rename existing locations (like your favourite pizza place) or locations that don't have official entries in Google's database (like a random spot in the park, or a certain address). Just open up a location or drop a pin, click the three-dot menu in the upper-right corner, and choose "Edit Name". Give the place your custom name, and from then on you'll be able to search for it in Google Maps.