Unwanted Banner Ad on Mobile Version

Hi,

When I visit my site on my mobile phone, there’s an ad where (I believe) my tagline should be. It currently reads “make money lending money online” and the link is broken. I’m not sure how long it’s been there, I’ve only noticed it today. And as far as I can tell it doesn’t show up on my computer.

I’m not very experienced at diving into code so I might need some hand holding. I appreciate any help.

https://www.shealynemery.com