This is a term most often used by quilters when they have lots of sets of squares or other shapes to sew together. I actually am making fabric snowballs today and I chain pieced my fabric as I was sewing. Here is how it works so you can see if it might work for you in an upcoming project.
I have several sets of white fleece snowball sections to sew together using 1/4" seam allowance. I put my 1/4" foot on my sewing machine to make this process even easier.
First, I sew the first two fleece sections together. When I am done sewing, I pull out the pieces a little ways from the machine but I DON'T CUT THE THREAD. I then feed the next set of fleece pieces through the machine, pull them out maybe an inch and then start sewing the next set.
Do you see where I am going with this?
So by the end, I have a chain of fleece pieces and all I have to do and snip the threads in between the fabric pieces.
Now time to move on to the next step! I will keep you posted on how these turn out. I have to embroider their faces on before sewing the snowballs together.
Note: Snowball pattern and design is from Embroidery Garden