For some companies a shared server may be sufficient. These companies hosting their sites on a single server, which means that shared machine. The benefit of shared hosting is its lower price, and a decision is optimal for companies without credit card transactions, with little traffic, or for companies in their databases do not contain important information.
By contrast, in the case of companies that depend on their websites and databases for the smooth running of the business, invest in a more controlled as the dedicated server is the best option.