HTML Guide for title
The <head> section of an HTML document contains metadata about the document, and as a minimum it must include a <title> tag defining the document title.
Common causes for this issue are forgetting to define the <title>, or duplicated <head> sections where one of them does not include the title.
Here’s an example of a minimal HTML document including the title:
<!DOCTYPE html>
<html>
<head>
<title>Don't panic! This is the title</title>
</head>
<body>
<p></p>
</body>
</html>The <title> element, used to define the document’s title, is required and must not be empty.
Example:
<html>
<head>
<title>Automated Website Validator</title>
</head>
<body>
<p>...</p>
</body>
</html>