Vertical integration occurs when a company expands operations across different steps in the production process, such as when a manufacturer owns suppliers and distributors. Some advantages include greater control over the business and lower transaction costs, while disadvantages can include decreased flexibility and capacity issues. Horizontal integration is when companies in the same market segment merge, such as when one music publisher acquires others. Benefits include economies of scale and scope from shared resources, though it may also create a monopoly and increased workload.