the first way the brain can be divided is laterally, ie a left half and a right half. these halves are called hemispheres.
Each two of the hemispheres can be further divided into four lobes, frontal, parietal, occipital, temporal,
the two hemispheres are not symmetrical - they do different things, eg the left hemisphere tends to be more focused in language processing. whereas the right hemisphere tends to be more involved in processing spatial relationships
Language is dominated by the left hemisphere of the brain, suggesting for the majority of us, language is subjected to hemisphetic lateralisation