system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 how does a brain store information better when there’s an interest rather than when there isn’t?
gpt
Picture a sandbox on a breezy day. Emotions have an impact like drawing deeply. 

Deep lines in the sandbox make it easier to see even if some sand blows in. Also, every time you think of the same thing you redraw it even deeper.  

Repetition is really what makes things stick, so the initial impact (omg! This is so cool!) makes a good solid picture, and something you’re interested in will also be repeated in your mind redrawing those lines even deeper.