What could be causing my website to display incorrectly?

I’ve just had someone contact me to say my website looks weird and when I checked it looks like the image. I have no idea why or how to fix it or what to search the help section under, any suggestions please? I’ve not had any notifications of anything being wrong, everything is up to date billing wise. I’m stumped.

same here. Looks like a shopify outage of sorts.

https://www.shopifystatus.com/

Ahh ok, that makes sense. Thank you so much for replying.