What are buds?
If you mean the buds on a plant, then a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of the stem.
Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be specialized to develop flowers or short shoots, or may have the potential for general shoot development.
A head of cabbage is an exceptionally large terminal bud, while Brussels sprouts are large lateral buds.
The term bud is also used in zoology, where it refers to an outgrowth from the body which can develop into a new individual.
Organisms such as hydra use regenerative cells for reproduction in the process of budding.
In hydra, a bud develops as an outgrowth due to repeated cell division at one specific site. These buds develop into tiny individuals and when fully mature, detach from the parent body and become new independent individuals.
Other animals that reproduce by budding include corals, some sponges, some acoel flatworms.