This is PageFly - Advanced Page Builder. I would love to give you some recommendations
Add this css at the bottom
Online Store->Theme->Edit code
assets->base.css
.announcement-bar__message {
margin-bottom: -11px !important;
}
.header {
position: fixed !important;
top: 0px !important ;
background-color: #fff !important;
width: 100% !important;
}
Best regards,
PageFly