A lot of teens do not save because they do not have a reason to. Saving feels abstract when they do not know what they are saving for. But when your teen has an actual goal in mind, saving becomes real. It transforms money from just numbers into something tangible they are working toward.
The goal does not have to be huge. It can be a hundred dollars for something they want, or a thousand for a car. What matters is that they have a number in mind, know why it matters, and can see the progress as they get closer.