Effectiveness refers to the degree to which a specific goal or objective is achieved. It measures how well a process, action, or strategy produces the desired outcome. For example, in a business context, a marketing campaign is considered effective if it successfully increases sales or brand awareness. In various fields, such as education or healthcare, effectiveness can be assessed through specific metrics or outcomes. For instance, a teaching method is effective if it improves student learning, while a medical treatment is effective if it leads to better patient health.