A button is a just a clickable button with optional icon.
{{% button href="https://getgrav.org/" %}}Get Grav{{% /button %}}
{{% button href="https://getgrav.org/" icon="fas fa-download" %}}Get Grav with icon{{% /button %}}
{{% button href="https://getgrav.org/" icon="fas fa-download" icon-position="right" %}}Get Grav with icon right{{% /button %}}