Web development refers to the process of creating, building, and maintaining websites and web applications. It involves various disciplines such as web design, programming, and database management to produce functional and user-friendly websites that meet business objectives.

Web development typically involves the following steps:
- Planning and research: This involves understanding the client’s needs, identifying goals, and conducting research on competitors and industry trends.
- Design and layout: This involves creating a visual layout and design for the website or web application, which includes the use of images, typography, colors, and other design elements.
- Content creation: This involves creating and organizing the text, images, and other content that will be featured on the website.
- Development and coding: This involves coding the website or web application using programming languages such as HTML, CSS, JavaScript, and PHP, among others.
- Testing and quality assurance: This involves testing the website or web application for bugs, errors, and other issues to ensure it functions properly.
- Deployment and maintenance: This involves launching the website or web application and ongoing maintenance, updates, and security.

There are various types of websites and web applications, including static websites, dynamic websites, e-commerce websites, and web-based applications. Web development requires a mix of technical skills, creativity, and attention to detail to create effective and engaging websites that meet the needs of businesses and users.