In the realm of web development, “Hello World” is an iconic starting point that symbolizes a developer’s first step into coding. It is traditionally the first program written by beginners to familiarize themselves with a new programming language or technology. In JavaScript, displaying “Hello World” is a straightforward task that can be accomplished with a few lines of code.

To begin, the phrase can be shown in the browser’s console using the command console.log('Hello World');. This simple line instructs the browser to output the text to its console, providing immediate feedback to the developer.

Furthermore, linking a JavaScript file to an HTML document is essential for organizing and executing more complex scripts. This is done by adding a <script> tag within the HTML file, usually placed just before the closing </body> tag for optimal loading performance. The tag’s src attribute should point to the JavaScript file’s path, like so: <script src="script.js"></script>. This method ensures that the JavaScript code is cleanly separated, enhancing both readability and maintainability of the web project.