Yup, that is exactly what it means
There are commercial products available that are fantastic, I have only ever used, and love, www.cricketfood.com worm bedding and cricket food. I put baby carrots in for moisture and that's it! The worms (mealies and supers, not together though) live in it and the crickets just need a little dish of it. You can make your own using whole oats, wheat bran, dry milk, rice cereal, bee pollen etc., I just find it easier to buy it pre-made.