Essential features refer to the fundamental characteristics or attributes that define a product, service, or concept. These features are crucial for understanding its purpose and functionality. For example, the essential features of a smartphone include its ability to make calls, send messages, and access the internet. In various fields, identifying essential features helps in evaluating options and making informed decisions. In software development, essential features might include user interface design, security measures, and compatibility with other systems. Recognizing these key elements ensures that users can effectively utilize and benefit from the product or service in question.