Broca refers to a region in the frontal lobe of the brain, specifically in the left hemisphere, that is crucial for speech production and language processing. Named after the French physician Paul Broca, who discovered its significance in the 1860s, this area is involved in forming coherent sentences and articulating thoughts verbally. Damage to Broca's area can lead to a condition known as Broca's aphasia, where individuals struggle to speak fluently but often understand language well. This condition highlights the importance of Broca in communication and the complexities of the brain's language functions.