The intuitive model of promotion is that you do good work, somebody notices, and you are rewarded. It is wrong in a specific and fixable way.
What actually happens
In most organisations, promotions are decided in a meeting. Your manager goes in with a case. Other managers, who have never seen your work, ask questions. Someone from HR checks it against a budget and a level definition.
Three things follow.
Your manager is your advocate, and can only argue what they know. Excellent work they cannot describe is invisible in that room.
It is comparative. You are not measured against a standard, you are compared to other people being put forward at the same time.
It is constrained. Budget, headcount, and timing decide as much as merit. A no is often a "not this cycle" rather than a judgement.
The gap this creates
The people who get promoted are rarely the ones doing the best work. They are the ones doing good work that the decision-makers can describe.
That is not a cynical observation about politics. It is a practical one: if nobody can articulate your impact, there is no case to argue, regardless of how good the work was.
What to do about it
- Find out what the next level actually requires, in writing.
- Do work that visibly matches it.
- Make sure your manager can describe that work in one sentence, with a number.
- Ask explicitly, well before the decision window.
The rest of this course is those four things in detail.