Projection simply means to see in others what we see in ourselves.
The most common form of projection is simply recognition, seeing a characteristic in me and you. This allows us to open up for genuine empathy and for seeing our shared humanity. We are all in the same boat.
Other times, I only see it in the “other” and not in myself. This opens up for blind attachments, in the form of blind aversions (fear, anger, disgust) and attractions (desire, conventional love).
And other times again, I may see it only in myself and not in others, and that is an absence of projection. This may take the form of inflation, arrogance, megalomania, hubris, uncaring, etc.