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Web development encompasses a broad range of activities related to the creation and maintenance of websites and web applications. It involves both the technical aspects of building a website and the non-technical aspects, such as user experience and content creation. Here's an overview of the key components of web development:

Front-end Development: Front-end development focuses on the visible parts of a website or web application that users interact with. It involves writing code in languages like HTML, CSS, and JavaScript to create the layout, design, and functionality of the user interface. Front-end developers also ensure that the website is responsive and accessible across different devices and browsers.

Back-end Development: Back-end development involves working on the server-side of a website or web application. Back-end developers use languages like Python, Ruby, PHP, and JavaScript (Node.js) to build the server, application logic, and database interactions. They also handle tasks such as user authentication, data storage, and server-side security.

Full-stack Development: Full-stack developers are proficient in both front-end and back-end development. They can work on all aspects of a web application, from designing the user interface to building the server-side logic and managing the database. Full-stack developers are versatile and can work on projects independently or as part of a team.

Web Design: Web design focuses on the visual aspects of a website, including layout, typography, and color schemes. Web designers use tools like Adobe Photoshop, Sketch, or Figma to create mockups and prototypes of websites before they are developed. They work closely with front-end developers to ensure that the design is implemented correctly.

Content Management Systems (CMS): CMS platforms like WordPress, Joomla, and Drupal allow users to create and manage website content without needing to write code. Web developers often work with CMS platforms to customize websites and add additional functionality through plugins and themes.

Responsive Web Design: Responsive web design is an approach to building websites that ensures they look and function correctly on all devices, including desktops, laptops, tablets, and smartphones. This involves using flexible layouts, images, and CSS media queries to adapt the site's design to different screen sizes.

Web Accessibility: Web accessibility refers to the practice of ensuring that websites are usable by people with disabilities. This includes making sure that websites can be navigated using a keyboard, providing alternative text for images, and using colors and fonts that are easy to read for people with visual impairments.

Search Engine Optimization (SEO): SEO is the process of optimizing a website to improve its visibility in search engine results. Web developers can help improve a site's SEO by ensuring it is well-structured, loads quickly, and uses relevant keywords in its content.