It happens that if you are good at what you are doing you won't be promoted, because it will be hard to find someone to replace you. So you have to clearly sign

It happens that if you are good at what you are doing you won't be promoted, because it will be hard to find someone to replace you. So you have to clearly signal that you want to move, because for your manager it might be more comfortable to know that you are here, reliable and productive.