You have several options for how to style hyperlinks. You use 'a' in the style sheet to indicate you are styling links.
a {
..... (any property like color, font-family, background, etc.)
}
A link also has four "states": normal, once it's been clicked on, when it's hovered over, and when it's actually being clicked.
a:link {
....
}
a:visited {
....
}
a:hover {
....
}
a:active {
....
}
This is probably the place that text-decoration is most often used, and it's used to remove underlines for links. (It used to be that all links were underlined, so that's the default, but more modern designs often do not underline links.)
a: link {
text-decoration: none;
}