Why does your eye see rows and clusters that nobody actually drew?
Scatter some dots on a page and your brain instantly sorts them into groups you were never shown.
Your visual system organizes the world before you think about it. By the principle of proximity, things placed close together get read as one group; by similarity, things that share a color, shape, or size get bundled together. You don't choose to do this - the mind builds wholes out of separate parts automatically, which is why a crowd reads as clumps and a screen of icons reads as tidy rows.
Phone numbers are written 0987 654 321, not 0987654321 - the spaces let proximity chop one long string into three chunks you can actually remember.
What looks like one neat group is often just your brain grouping things by closeness or sameness, not a real boundary.
Space your menu, your slides, or your message into clear groups and people grasp it instantly - crowd everything together and it reads as noise.
Close together or alike = your brain glues them into one.
Learn the idea and practice English at the same time.