Computer science is a field that focuses on the study of computers and computational systems. It involves both theoretical and practical aspects, including the design and analysis of algorithms, programming languages, software engineering, computer architecture, databases, artificial intelligence, and more.

In the context of website development, computer science plays a crucial role in creating efficient and functional web applications. Web development involves writing code that can run on web browsers, which requires an understanding of programming languages such as HTML, CSS, JavaScript, and others.

Computer science is also important for website security, as it involves designing systems that can protect websites from cyber-attacks and other malicious activities. This involves studying encryption, authentication, and other security mechanisms to ensure the confidentiality, integrity, and availability of website data.