I don't really know how to ask this question, I googled, but I couldn't explain myself in a very short line in the google search bar, so I didn't get any result, so I thought it would be better to ask it here.
I'm new in 3D and I'm teaching myself, and whenever I make a 3d object and compare it to a good model that has been made by a professional 3d artist, I always notice that the vers that I have in my model look terrible compare to them. by that, I mean that the verts I put in my model are not even, whereas all of the faces(i don't know if I'm saying it right or not) that a professional make, always looks like a square and have only 4 verts. they always fill 4 verts into a plane and make keep it look like a square or a squarish rectangle(if you will) but mine are not like that. some times in my models I have a plane that has 7 verts, and it's not square, not even a rectangle.
I know it's difficult for you to understand what I'm saying, I'm just trying my best to explain.
Please take a look at these pictures, they will help you understand what I'm trying to say.
If you take a quick look, the faces are almost in the same size, and they fade into smaller ones. and they're all even and looking squarish. (Yes I know it's in edge select mode which doesn't show verts) but I think you get what I mean, I have seen many models in vertex select mode and they're like that.
polygons are not even at all, sizes are totally random, and some of the polygons have more than 4 verts.
My questions are, Is it important? if yes, should I fix them one by one or is there a better way or an addon to do the job?
in addition to that, I'd like to kindly ask you to please, explain to me a bit more about these polygons. triangle polygons vs square polygons, or things like that, if there's any tip or important thing that I need to know about polygons, faces, verts when modeling.
and one last thing, I really thought about a good title for my question, but I couldn't find anything that can explain my problem, hope I'm not getting downvotes.