I label my quilts so that whoever comes across them in the future will know something about them. I put the name of the quilt, whether it is machine or hand pieced, machine or hand quilted, the dates of piecing and quilting, my name and town, the recipient and town, the name of pattern and designer, and if it happens to be all one fabric line, the name of the fabric line and designer.
I print this information on a light piece of fabric with a permanent marker (I tried printing out labels on freezer paper but they jammed), then frame the label, usually with the same fabric as the binding, then turn under the frame edges and hand stitch as with the binding, after quilting.