Email address extraction refers to the process of gathering email addresses from various sources, such as websites, online directories, and social media platforms. This technique is commonly used by businesses and marketers to build their email lists and reach out to potential customers. It involves using specialized software or tools to automatically scan and extract email addresses from online content, saving time and effort compared to manually collecting them. However, it is important to note that email address extraction should always be done ethically and with the consent of the individuals whose email addresses are being collected.