Header Top Area Text

I got rid of the huge headline box on your template, and now I see only this: "This is Header Top Area. Assign Header Top Menu and Social Icons from Theme Customizer" Sorry but I don't know what this means, yes I know it's the header top area, that's obvious but everything after that makes no sense to me. Where is the area to change this top text and/or add Social Icons? I have no clue. Where is the Theme Customizer? It's easy for you because you developed it, for me I don't know where any of these things are located in my WP admin panel. Please clue me in. Thanks