A website is a collection of related web pages that are accessed through the internet. Each website has a unique address, known as a URL, which allows users to find it easily. Websites can serve various purposes, such as providing information, selling products, or offering services. They are built using languages like HTML and CSS to create the layout and design. Websites can be simple, like a personal blog, or complex, like an online store. Users can navigate through different pages using links, which connect them to other content. Popular websites include Google, Facebook, and Amazon, each serving distinct functions for their visitors.