Description: Data ‘Observers’ in Vue.js are functions that monitor changes in data properties within a Vue instance. Their main goal is to react to modifications in the data, facilitating the creation of reactive and dynamic applications. When an observer is defined, a function can be specified that will automatically execute whenever the observed data changes. This is particularly useful for tasks such as data validation, updating the user interface, or executing additional logic in response to changes. Observers are an integral part of Vue.js’s reactivity system, which relies on detecting changes in data to automatically update the corresponding view. This feature allows developers to build more efficient applications with less code, as the need to manually handle changes in the user interface is eliminated. In summary, data observers are a powerful tool in Vue.js that enables developers to create interactive and reactive applications easily and effectively.