Ad in header

Hi! My website is https://www.GreatFoodLifestyle.com. Thanks for a great theme! If you look at my home page you’ll see an ad in the top section under the header. I got that to show up by adding the text widget to the “Wide” section. The ad only shows up on my home page, though, and I’d like to have it show up throughout the site. Can you please advise me on how to do this? Thanks!