Explanation:

  1. Document Metadata: Meta tags provide information about the HTML document. The charset specifies the character encoding, and the viewport sets the initial scale for responsive design.

  2. Bootstrap CSS Link: The <link> tag is used to include the Bootstrap CSS file, which provides styling for the document.

  3. Title: The title of the document is changed to "Keyboard Inputs."

  4. Container: The container class from Bootstrap is applied to create a container with a top margin of 3 units.

  5. Headings and Paragraphs: Descriptive headings and paragraphs explain the purpose of the document and provide examples of keyboard input usage.

  6. kbd Element: The <kbd> tag is used to represent keyboard input, providing a visual indication of the keys to be pressed.