Hi,
I have had the same issue with my iPad. I am very worried, as I downloaded a PowerPoint theme before I noticed it, I am worried that it could be malware? I contacted Apple and they said that they didn’t really know why it was there but if it was malware then Apple makes sure that your privacy is safe. They didn’t directly answer what it was and why it was there. Have you got rid of it? Did you download anything before you got it?
Thanks,
32icedragons