Okay, imagine we're telling a story. We want to make it more interesting by using a fun writing trick called "cataphora".
Cataphora is when we use a pronoun (like "he" or "she") or a word to refer back to something that hasn't been mentioned yet. It's like a little puzzle for our readers to figure out what we're talking about.
For example, if we said "She looked into the dark box. It was full of shiny treasure", we're using cataphora with the word "it". We haven't mentioned what "it" is yet, so our readers have to think and figure out that "it" refers to the box.
So basically, cataphora is using a word to refer back to something that hasn't been mentioned yet. It's like a little game we play with our readers to keep them engaged in the story.