I am new to pgrouting. How does it work? What benefits can I get from it? I tried the examples, read some articles, but could not find the QGIS routing plugin for Windows. It is not showing up in the plug-in manager. Finding a route in a given dataset by mentioning a start and end node works, but it is not performing on my local road network shapefile. The query executes, but doesn't show any results.
Also it says
Postgres with PostGIS and pgAdmin QGIS with PostGIS Manager and RT Sql Layer plugins
I don't find PostGIS Manager and RT Sql Layer plugins. Have seen osm2po articles, how do they work? What do I do next?