Web development is the process of creating and maintaining websites and web applications, involving everything from designing the look and feel (front-end) to building the behind-the-scenes logic and databases (back-end), using languages like HTML, CSS, and JavaScript to make sites functional, interactive, and accessible for users. It covers the entire lifecycle of a website, ensuring it runs smoothly, securely, and provides a great user experience. 

Core Aspects of Web Development:

• Front-End (Client-Side): Focuses on what users see and interact with in their browser, using HTML for structure, CSS for styling, and JavaScript for interactivity.
• Back-End (Server-Side): Deals with servers, databases, and application logic, ensuring data is stored, retrieved, and processed correctly.
• Full-Stack: Involves both front-end and back-end development, with developers proficient in both areas. 

Key Technologies & Tasks:

• Languages: HTML, CSS, JavaScript, Python, PHP.
• Frameworks/Libraries: React, Angular, Vue.js (for front-end).
• Content Management Systems (CMS): WordPress, Drupal, Joomla! for easier content management.
• Tasks: Coding, design, database management, security, performance optimization, and content creation. 

In Simple Terms:

If web design is the blueprint and interior decorating, web development is the construction, wiring, plumbing, and all the systems that make the building work