Drying cannabis is the first step after harvesting cannabis. Drying is done to remove moisture from the outer parts of the flower. There are two methods to trim the flower after harvesting. Wet trimming is one, and dry trimming is the other. 

When wet trimming, you want to trim the buds while they are still wet, and then after cutting them, dry the bud. And with dry trimming, you dry the plant and then go ahead and trim the bud. 

The conditions for both processes should be the same, which is in a 60 degree Fahrenheit in a dark room with between 55 and 60 percent humidity. Not sure how to figure out how humid your room is? Use a hygrometer.

A small fan is also essential in the process because you will want the airflow to be moving in the room as well. This is done to ensure that there is no direct airflow on the cannabis itself. You do not want the marijuana to dry out quickly. And although the conditions are the same for wet or dry trimming, the timeframe to dry them will be different. 

Some people also choose to use air conditioning units and dehumidifiers during their drying processes. These have been found to help with climate control. But every space is different so use what is going to be best for you and your bud.