[postgis-users] What's the Purpose of the Geometry_Columns Table?

[Bill Thoen]

I created a table using a 'SELECT * INTO ...' statement which contained a
geometry column, and then I performed a few more spatial selections on it
without problems. Later I realized that the geometry column in my new table
wasn't referenced in the Geometry_Columns, but it didn't seem to matter. So
what is the purpose of the Geometry_Columns table?