The fuller answer
Temporary housing can include shelters, motels, staying with relatives, couch surfing, cars, transitional programs, or moving repeatedly. A young person may not use the word homeless even when the housing is unstable.
Instability affects sleep, privacy, school attendance, transport, food storage, hygiene, medicine, internet, belongings, and friendships. These are structural problems, not evidence that a family or young person failed.
Schools and community programs may provide enrollment protection, transport, meals, supplies, document help, and a liaison for students without stable housing. Asking early can prevent a move from becoming an educational crisis.