Homeopathy is a system of alternative medicine developed in the late 18th century by Samuel Hahnemann. It is based on two key principles:

1. "Like cures like" - This means a substance that causes symptoms in a healthy person can treat similar symptoms in a sick person when used in diluted form.

2. "Law of Minimum Dose" - Remedies are diluted and shaken (a process called potentization) to enhance their healing properties, even though the dilution is so extreme that no molecules of the original substance may remain.

Homeopathic remedies are used to treat a wide range of conditions, from minor ailments like colds and headaches to chronic diseases. While some people report positive effects, the scientific community remains skeptical, as studies show homeopathy often works no better than a placebo.