Most seasoned tokers will tell you that a weed/herb grinder is one of the most important tools in a tokers arsenal. The ability to crush your cannabis up and have it ready to be packed in a bowl, or ready to roll for a joint is a great thing. Most of us realize that your weed doesn't come broken up and, before you can truly enjoy it, you need to break it down. Using a grinder means less hand contact with the cannabis and more trichomes (crystals) for getting high.
By breaking up the weed, you are going to a get a more consistent smoke. Whether you are smoking a joint, vaporizing or blasting a bong, you want a nice even grind. You don't want little nuggets unground in your smoke, they burn funny and don't really give you the burn that you really want. With the price of good Cannabis these days you do not want to be wasting any precious THC
Better Joints and Bowls
Cannabis that has been through a grinder just smokes better. You get nice airflow over the trichomes and leads to a better tasting smoke, or vape. Especially in a vape, where you have smaller bowls, the airflow will make the vaporizer experience better. When you don't grind your cannabis, the product burns unevenly, and wastes some of the cannabis.
Kief is a fine powder made from trichomes that are found on the leaves of the marijuana plant. It contains a high concentration of the psychoactive chemical or THC that causes euphoric feelings or opium-like high that can last for hours. When you have a multi stage grinder you have a screen which filters out the keif. You are then able to smoke you cannabis and save a bit of the high end stuff for later. You can sprinkle the kief on a bowl, or roll it in a joint or puff it in your Vape for a little extra high.
There are so many benefits of having a grinder that there is no wonder it is one of the most important tools for getting high out there. As you continue your toking education, you will definitely understand why a grinder needs to be in you smoking tool pack.