.ads-section.center {
    text-align: center;
    margin-bottom: 15px;
}
.ads-section.center:after {
    clear: both;
    content: " ";
    display: table;
}
.ads-section.right {
    float: right;
    margin-left: 15px;
    margin-bottom: 10px;
}
.ads-section.left {
    float: left;
    margin-right: 15px;
    margin-bottom: 10px;
}