Why are there duplicate pages of my website online and how to resolve it?

[TP9]

There are duplicate pages for my website- not created by me. Anyone knows what that may be caused by and how to fix it?

[Shreyansh99]

Hello TP9,

I might be able to help you. Can you let me know which pages have been duplicated for your website? 

[TP9]

Thanks, I would rather not. What are some of the reasons that may cause this?