“I just got the manuscript back from my editor, and it’s covered in red. What do I do now?”
Not all repetition is bad. It can be used to emphasize or connect important ideas, like “I have a dream” in MLK’s best-known speech. But most of the time, it’s simply clutter. You want the reader so immersed in your story that they forget they’re reading words on a page. Anything that reminds them of your fingers on the keyboard MUST go.