You can move them about to find just the right amount of sun vs shade. Most prefer dappled sunlight or part-shade. Too much shade makes them green and leggy (like these poor neglected fellows) but the midday or even the afternoon sun can be fierce in summer and can burn them.
You can clean fallen leaves and debri out of their well more easily - just tip it upside down and shake. Rotting vegetation in the well will kill most broms.
You can divide them more easily when they set pups.
This year I have quite a few that are really overdue to be divided. I like to wait until the pups are between 1/3 and ½ the size of their mother before removing (I seem to lose quite a few if I try too soon).
Sometimes by the time I divide them, the mother plant has died and the pot has three or four pups fighting for space.
Other people may have different methods, but this is how I divide them.
I cut the pups off as close as possible to the mother plant. Some you can twist and they break off easily. You may need to take the plant out of the pot and remove some of the mix to do this. In that case, I sit the pot in a styrofoam box to avoid spilling the potting mix everywhere.
The smaller pups will go under a tree in the shade where I will remember to check on them & water them until they form a good root system. The others go back into various part of the garden. That is the fun bit - rearranging the garden.
Some I'll plant directly into the ground when they are big enough to survive but most will remain in pots. Some will be given away to friends.