Final answer:
Companies monitor Internet use to ensure productivity and prevent misconduct. They restrict access to inappropriate websites and are guided by management decisions and legal regulations.
Step-by-step explanation:
A company may want to monitor Internet use at work primarily to ensure productivity and prevent misconduct. It is not mainly about invading employee privacy or discouraging Internet use altogether, but rather about making sure that the access is used appropriately and does not interfere with the employees' performance. In a professional setting, deciding what Internet activities to allow and which to restrict is usually the prerogative of the company management, often guided by legal advisors to ensure compliance with relevant laws and regulations. Activities like accessing illegal gambling and po_rnographic sites are typically prohibited due to their potential for creating liabilities and distractions in the workplace.