Wikipedia
Comb honey is honey intended for consumption which is still contained within its original hexagonal-shaped beeswax cells, called honeycomb. It is eaten as produced by honey bees and has received no processing, filtering, or manipulation.
Before the invention of the honey extractor almost all honey produced was in the form of comb honey. Today, most honey is produced for extraction but comb honey remains popular among consumers both for eating 'as is' and for combining with extracted honey to make chunk honey. Hobbyists and sideliners can develop their beekeeping skills by producing comb honey, which takes more rigorous attention to beekeeping than the production of extracted honey. Because of the more demanding labor involved, comb honey has greater retail value than extracted honey. ($17/pound compared to $6.50/pound US). Comb honey production is more suitable for areas with an intense prolonged honeyflow from eucalyptus, alfalfa, alsike, and yellow clover. Wooded areas are not as suitable for comb honey production, as bees tend to collect more propolis, making the harvesting of comb honey more difficult. This problem has been largely circumvented with the adoption of specialized frames, such as the Ross Round frame, which prevent accumulation of propolis on saleable units.