These examples show some use cases of osm2pgsql and highlight some features.
This is the "classical" job of osm2pgsql: Import OSM data into a database to create raster tiles from.
Osm2pgsql imports OSM data using a very flexible configuration making it easy to generate any kind of vector tiles.
The Nominatim Geocoder uses osm2pgsql for the import of OSM data. It adds its own postprocessing to create the special data structures needed for geocoding.
Need only a few feature types? Import only what you need for a quick map.
Osm2pgsql can use many different projections to fit the area covered and your use case.
An osm2pgsql database is well-suited for geospatial analysis using the power of the PostGIS database extension.
Creating a POI map
Use osm2pgsql to create a points-of-interest map.
Use height information on OSM buildings to create a simple 3d map.
Exporting OSM Data
Osm2pgsql and a database can be used as a step in exporting OSM data into many different GIS formats.