Basically, efficacy is the belief of “you can do it”.
Efficacy is so important because without any self-trust in your skill or abilities, you are a detriment to your own goals. The first step to reaching your goals is believing you can do it. Once you truly believe this, you will only continue to achieve and grow.
Sometimes, finding something you are confident at is hard; but its important you find something. When you feel like you can’t do anything, then that is really the time it’s important you can do that one thing–showing you having efficacy in it.
Remind yourself to always have efficacy in everything you do.