Oh well I thought it might block up general with so many questions as there is.

And IMO, the best place for a young/injured wild bird to be is in a wildlife/bird rehab or sanctuary
Well not everyone is that close to one of those and the animal may be very hungrey so they would need tips on feeding them and keeping them warm.
Some ppl dont even have a wildlife rehabe near them and if they do it could be a 1 hour drive away.