Silman's Positional Chess & 'Weak Squares'

I have been studying Silman's 'Roots of Positional Understanding.' One concept that is new to me is the idea of 'weak squares.' I used to only analyze weak pieces, never weak squares. It's helpful for understanding pawn moves & why it's dangerous to push pawns too early. Whenever I'm analyzing Silman's puzzles, his explanations make sense & I can see why he's correct. When I'm analyzing boards without guided vision, I tend to make the wrong move more often than not.

My question is how do I improve my vision of weak squares & positional dynamics? Is it simply that I need more repetition?  What practical tips can people suggest?

I have included one of his puzzle below. It's white's turn to move & the correct move is White a4. His explanation is that black wants to pawn storm the queen side & grab space. I guess that makes sense to me, but I wouldn't see this on my own.

Thanks in advance for any advice!

Don't read that book, just focus in improving your visualization and tactics until you reach a higher level(around 2000)