Some people use boards that are fixed (attached) and scrape the droppings off into a bucket for removal. I use plastic boot trays held on shelf supports under the roosts. The plastic tray is light and easy to remove, take over to my composter and dump out. Most of the droppings don't stick to the plastic and just roll right off. I use an old garden trowel to scrape off the cecal poops. Then I hose off the trays and replace them under the roosts.
In freezing weather (which we don't usually get here, but right now we are), I can't hose off the trays because all our outdoor faucets are shut off and insulation wrapped. So instead I simply sprinkle a little sand from the coop floor onto the trays.
The basic idea of a poop board is to make it easy to remove the droppings that accumulate from nighttime roosting in one place. You'll find that this amounts to about half, maybe a bit more, of a hen's daily production of poo. When my husband took over the chicken chores while my daughter and I were at Disneyworld, it kinda surprised him how much poo our nine tiny bantams produced every night. To me, though, it doesn't seem nearly as much as our small dog deposits every day...somehow right in my path to the chicken coop so I have to shovel it up and move it or risk stepping in it.