I use a serger to overcast the raw edges of fabric before I wash it.

Occasionally I will use the serger to overcast the edges of a quilted top before I put the binding on.

If I have a pieced border on a top, I will stay stitch that about 1/8 inch from the edge to keep the pieces from pulling apart before layering it with the batting and backing.

If I have quilted pieces for something like a bag, I will serge the edges to get a nice finish.

I've been quilting for over 30 years and don't own a serger. So that's my answer! :)

I always serge the edges of my quilts after I quilt them. It is an easy way to cut the excess batting off and leave a nice firm and clean edge for binding. I use a relatively narrow 3 thread overlock to make sure it won’t show under the 1/4” binding seam.

I first got a serger for making knit pull over shirts. That was a popular thing to do in the day. I only took a few dollars for the fabric and about 1.5 hours to make a shirt. It made applying the ribbing for the neck so easy. Then I used it for serging the edge of yardage to prevent raveling before washing and also found it work great for when working with polar fleece. I made a lot of two-layer polar fleece blankets for my dog beds and crates. I have also used it for shortening work jeans. Just serge to cut off the excess length, turn it up a bit and straight stitch to hem them. Easy Peasy. I don't use mine very often now.