The Loom Knit Stockinette Stitch bounces across the loom skipping every other peg going across and then wrapping the skipped pegs coming back.
Getting started with this stitch requires you to secure the beginning. I am recommending a cast on using the Twisted Knit Stitch Method and then begin this once the cast-on is complete. If you don't, the ends will not secure. There are other methods for securing it as well but I found this to be the easiest.
The tutorial below includes cast on and then demonstrations of this stitch with tips.