# Introduction In HTML, the `<summary>` tag is used to create an expandable and collapsible summary element for the content present in the web page. > Note: You can practice coding in `index.html` and learn [How to Write HTML in Visual Studio Code](https://code.visualstudio.com/docs/languages/html). Please click on 'Go Live' in the bottom right corner to run the web service on port 8080. Then, you can refresh the **Web 8080** Tab to preview the web page.
Click the virtual machine below to start practicing