Dropping Menu Bar Slightly

CSS:

ul#primary-menu {
    margin-top: 1rem;
}

Thank you Shannon,
Where exactly do I need to place it.

You probably need to review this: https://codex.www.ads-software.com/CSS

It’s integral to editing WordPress sites to know about CSS

@whitsey – The entire site is using pixels, why would you suggest rems?

@jaycbrf
Because I always use rems.
Because it achieved the desired result
Because it is a workable solution
Because rems are flexible, scalable units which are translated by the browser into pixel values