I am a secondary school student, so I don't have much of a math background. The replies so far have left me bewildered!
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There really aren't many uses for the RH outside of math with the exception of cryptography perhaps. The reason is because cryptography utilizes the "randomness" of the prime numbers and proving the Riemann Hypothesis is equivalent to putting a really tight error term in the prime number theorem.
Other applications of proving RH are stated here:
Consequences of the Riemann hypothesis
Consequences of the Generalized Riemann hypothesis