Summary  
Internal CSS involves embedding style definitions within an HTML document’s head using a style tag to apply page-specific styling without relying on external style sheets.  

General domain of usage  
Web development

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When you want to apply CSS styles to a single HTML document, **internal CSS** is a practical approach. Internal CSS uses the `style` tag placed within the `head` section of your HTML file. This method is different from **external CSS**, which links to a separate `.css` file for styling multiple pages. Internal CSS is especially useful when you need to quickly test styles or apply unique styles that do not need to be reused across several pages. However, if you find yourself repeating the same styles on multiple pages, using external CSS is a better choice for maintainability and reusability.

Where should the `<style>` tag be placed in an HTML document when using internal CSS?

Build a solid foundation in CSS and understand how styles shape the appearance of every webpage. Write and apply rules, target elements with selectors, and master the cascade and box model to create clean, organized designs. Gain the essential skills every web developer needs to style web content with precision and confidence.

Understand how CSS connects to HTML and defines the look of a webpage. Write clean, structured rules, manage multiple properties, and apply styles using external, internal, and inline methods for flexible control over your designs.

Target specific HTML elements with precision using selectors and combinators. Explore how the cascade, specificity, and inheritance determine which styles take effect when multiple rules overlap.

Apply visual styling that brings structure and balance to web layouts. Work confidently with colors, units, and the box model to control spacing, borders, and overall composition.