What does this number mean in comp panel

Hi,

I dnt understand something. I was wodering what this 270 x270 mean. I took a 2d shape it says 270 x 270. I took a 3d shape it still says 270 x 270. I change position, scale, path, but it dsnt change. no matter how many shapes I draw it still shows 270x270. I am becoming mad for not figuring it out. Please help me to be sane again. what is it. what its telling me? 😮

Thank you. 😥😥😥😥