Making a handspun sample is similar to knitting a swatch: it provides valuable information about your project, can be used to test washing and wear properties and gives you a chance to experiment with different techniques. 

If you bought a raw fleece recently you may be wondering, "Well now what do I do?".  Washing your own fleece can save you money, and it is very satisfying to see a rather stinky, filthy fleece turn into a clean and beautiful garment.