For those not familiar with LDS culture, this secret shows a picture of a “future missionary” nametag (it’s a real thing). It looks just like the tags worn by all LDS missionaries, except instead of the individual’s name it just says “future missionary”. It’s just a little gimmick tag worn by kids. Teenagers, generally, don’t wear them, because the tags are stupid.
My impression is that this Secret was created by a teenager who is unsure about whether he or she will be able to “stay good” long enough to be permitted to serve an LDS mission.