Instrument groups are categories of musical instruments that share similar characteristics or functions. The main groups include strings, woodwinds, brass, percussion, and keyboards. Each group produces sound in different ways; for example, string instruments create sound through vibrating strings, while woodwinds use air and reeds. These groups are often found in orchestras and bands, where they work together to create a rich tapestry of sound. Understanding instrument groups helps musicians and audiences appreciate the diverse ways music can be made, highlighting the unique qualities of each instrument within its category.