You have inspected a complete mission profile. The starter already has the doctype, English language, head, and body; fill in the missing content without removing that frame.
A complete HTML5 mission profile with a meaningful tab title, an English language declaration, visible profile content, and a source-only note.
<title> element a meaningful, non-empty title.<h1> inside <body> with a crew member's name.<p> inside <body> describing that crew member.<h1>.Run the page. The document title is in the source (the embedded preview may not show a browser tab); the preview should show only the heading and paragraph. Open the source to confirm that the comment is present but not visible in the page.
You have rebuilt the full structure behind a browser-ready HTML page. The next module expands the content you can place inside its body.
Keep <!DOCTYPE html> as the first line.
The title goes inside <head>; visible content belongs inside <body>.
A comment starts with <!-- and ends with -->.