Tunisian or Afghan stitch
One of the simplest crochet stitches. The even weavelike stitches, and the reasonably flat surface of this type of work lends itself well to various forms of needlework embellishment. It is worked entirely on the front of the work and is achieved by simply making a length of chain stitchs, then drawing a loop through each chain which is held on the hook to the end of the row, then drawing single chain stitchs back through each individual loop.
When done with warm weight yarns this creates a dense fabric with reasonable drape that has been compared to thermal blankets in warmth. When done with crochet cottons or lace weight threads, a sturdy fabric suitable for cross stitch or tapestry (needlepoint) is made.
If the special long crochet hooks often used in this type of work are unavailable, the loops may be kept on a seperate bar that is of a size with the hook being used, or a series of same size hooks may be used*.
*Thank you Butterfly!