If your postflop game is weak/tight, make bigger preflop pots when you have postflop position.

If your postflop game is aggressive, make bigger preflop pots when you don't - the general idea here is that you want to get most of the money in when you have the advantage (preflop) instead of when you are disadvantaged (postflop).

Imo it's a controversive topic since both sides can be defended..