One of the benefits of using a marijuana vaporizer rather than smoking or making edibles is the ability to accurately control the temperature.
Vaporizers allow you to experience a wide range of effects depending on the temperature set. I’ve put together a little chart based on data from vaporpedia entry, highlighting the important temperatures to pay attention to.
Personally, my favourite vaporization range is between 190 °C and 220 °C (I gradually turn up the temperature as I vaporize), but others may have their own preference.
My advice is to try different temperatures for yourself and see what best suits your needs. Keep in mind that using a vaporizer without a digital temperature gauge will make it much more difficult to achieve the temperatures exactly.