Many people are confused as to what hash and keif actually are. On the most basic level, hash is pressed keif. Over time, several methods of pressing keif into hash have come into existence. Just google it or look on youtube. You will find numerous methods. Some known methods include using an iron, a toaster, or water but ultimately the result is the same. Keif is turned into hash.
Keif is the crystals or trichomes on the bud itself that fall off. There can also be some plant matter mixed in, but keif is a very fine powder substance. Consumers are able to collect keif when using a grinder that has a screen and a section to collect and save the keif created when grinding up marijuana. Both are a great addition on top of whatever you are smoking! Keep in mind all concentrates are CONCENTRATED forms of marijuana and as such produce enhanced effects.