@Loudpack516,
Cannabis "defoliation" is the process of removing leaves from your cannabis plants. Many growers believe defoliation can be used as a tool to increase cannabis yields indoors, but there are also a lot of cannabis growers who will say that plucking leaves off cannabis plants (defoliation) is not beneficial for your cannabis yields in any way.
Defoliation isn’t for everyone in all setups. It should only be used in specific situations. For example, defoliation doesn’t appear to be effective for outdoor plants. But for indoor growers, cannabis defoliation done right results in bigger yields.
Defoliation will not make up for other problems like too-hot conditions, not enough light or nutrient deficiencies. If you try to defoliate plants that are not in tip-top condition, you're asking for trouble because defoliation will only stress your sick plants further.