"To discover the secret" means to find out or learn something that is hidden, unknown, or not easily understood. It could refer to unraveling a mystery, understanding a hidden truth, or uncovering confidential information. Full definition
You owe yourself the feeling of youth and beauty, health, and vitality that so many others are experiencing as the result of discovering the secrets of the pomegranate. (amazing-pomegranate-health-benefits.com)
I love to try new beauty products and discover the secrets behind beauty. (blog.feedspot.com)
Most people just played for fun, but some played enough to discover a secret about the game - there were glitches. (kickstarter.com)