Draw calls are instructions from the CPU to the GPU on what to render.
Very very simplified it means: the more visible objects are on screen the higher the draw calls. (it's more complex bc of batching etc)
Maybe you have some events that keeps creating objects? Take a look in the debugger and see if object count keeps rising.
Another thing that is very expensive is updating a text object every tick.
thanks for explonatiom i have first person 3d game so its true when i have camera on front to the city i have draw calls 24% bu when i look at empty space draw calls is 10%
also i will take look at events