If it says 'approved' and there is not more on another line, then you have your Residence (not called PR any more - PR is now something different
http://www.immigration.govt.nz/migra.../residence.htm).
You will receive within a short time a package in the post with further instructions. The basic thing is that within six months, you must pay the migrant levy and send in your passport to have the Residence visa (the blue sticker) applied. You must activate the visa by arriving in NZ and presenting your passport to be stamped at Immigration at the airport within 12 months from the date on the blue sticker.