I've sat through a lot of mock interviews with candidates applying to top programs, and the same thing sinks strong people in the first five minutes.
Asked to walk through their resume, they start at their first job and narrate forward. Dates, titles, responsibilities. Four minutes later they are still on job two, the interviewer has stopped listening, and the one thing that makes this candidate different from the other forty strong files that week never gets said.
Your interviewer has read your resume. They know what you did. The question is really asking why. Why this path, why those turns, why an MBA, why now.
The answers that work land as a sound bite. One sentence an interviewer can repeat about you when your file comes up later. Something like "she's the engineer who kept getting pulled into the business side until she decided to make it official." That sentence is what they remember. Nobody remembers a chronology.
A few things that help get there.
Pick the through line first. Every career has two or three real turning points where a choice was made. Build the story around those choices and what drove them, and let the rest compress into a line each. A job you held for three years might deserve fifteen seconds if nothing changed there.
Show, don't claim. If you say you are a leader, I hear an adjective. If you tell me about the night your team was falling apart and what you actually did, I believe you. One short story with a real detail in it beats five claimed traits.
End facing forward. The walkthrough should land on the gap. What you have done so far, what you want to do next, and the specific thing this program gives you that you cannot get where you are. When the story ends there, the MBA sounds inevitable instead of convenient.
And keep it tight. Two to three minutes, spoken out loud, not read. If you cannot say it comfortably at kitchen-table speed, it is not ready.
Happy to answer questions in the comments, including on specific situations if you want a second pair of eyes on your through line.