Improve README

README.md

@@ -4,6 +4,8 @@
 
 This module allows you to manage saved places (Points of Interest) using the [remoteStorage](https://remotestorage.io/) protocol.
 
+It leverages [Geohashes](https://www.geohash.es/) to organize data, enabling efficient retrieval of places within specific geographic areas. This structure is particularly optimized for map applications that need to load data only for the visible viewport.
+
 ## Installation
 
 ```bash
@@ -33,6 +35,10 @@ await places.store({
 // List all places
 const allPlaces = await places.getPlaces();
 console.log(allPlaces);
+
+// List places for specific geohash prefixes (e.g. for a map view)
+const areaPlaces = await places.getPlaces(['u33d', 'u33e']);
+console.log(areaPlaces);
 ```
 
 ## API Reference