Answer: The term screened compost simply means that finished compost is run through a screen to remove large particles of organic matter. If you were doing this at home, you'd want to remove twigs and lumps of bark, returning them to the compost pile to finish decomposing. The size of the screened particles depends on the processing facility. Usually compost is run through a 1/4-inch screen, but I've seen some bagged compost that resembles sawdust. Ask at the store if you can see a sample of the bagged compost. Smaller particles will decompose faster (and may spread easier).
Hope this helps clarify things for you.
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