Titles are important because they are displayed in search engine results as well as the browser’s toolbar.
This rule verifies that the <head> tag contains a <title> one, and the <html> tag a
<head> one.
Noncompliant code example
<html> <!-- Non-Compliant -->
<body>
...
</body>
</html>
Compliant solution
<html> <!-- Compliant -->
<head>
<title>Some relevant title</title>
</head>
<body>
...
</body>
</html>
