chikwarimba" refers to loose tobacco, which can be a stalk of tobacco or the leaves after they have been harvested. It's not specifically a benefit, but rather a material used in various cultural and traditional practices. For example, tobacco (including chikwarimba) is sometimes used in spiritual rituals or as a component in traditional medicine. 
Here's a more detailed breakdown:
Chikwarimba as Loose Tobacco:
In Shona, "chikwarimba" directly translates to loose tobacco, whether it's the stalk of the tobacco plant or the dried leaves. 
Use in Spiritual and Medicinal Practices:
Traditional healers and spiritual leaders may use chikwarimba in rituals or as an ingredient in traditional remedies. For example, it might be used to "expose" or neutralize negative spiritual influences, or as part of a treatment for certain ailments. 
Preventive Measures:
Some traditional practices involve using plants like chifumuro (a type of plant) as a preventive measure against illnesses, often involving tying a piece of the plant onto a string or fiber. While chikwarimba isn't specifically mentioned in this context, it highlights the broader use of natural substances in Shona traditional
How to use it
It can be used as snuf.