CSS Text Decoration
Text Decoration
The text-decoration property is used to set or remove decorations from text.
The value text-decoration: none; is often used to remove underlines from links:
a {
text-decoration: none;
}

The other text-decoration values are used to decorate text:
h2 {
text-decoration: overline;
}
h3 {
text-decoration: line-through;
}
h4 {
text-decoration: underline;
}

note
It is not recommended to underline text that is not a link, as this often confuses the reader.