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Learning to describe problems is hard, but it is an important part of learning how to code.
Also, the more you say, the more we can help!
I think it’s kind of obvious what the diffilculty is so let me help you so it says to change the text of the h1 to CatPhotoApp so all you have to do is look at the code and search for “Hello World” then delete the text and write CatPhotoApp in the place of the Hello World!