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https://hive.blog/faq.html#What_is_Reputation
Maybe this explains it. However, as Marky said, it's an useless metric as t serves for nothing much.

Thanks I will go through it.

You're welcome.

It's a logrithmic scale of all the rshares you earned. It's fairly simple, but converting that into the number you see is harder. Once you break about 62 rep it gets much much slower.

The higher is goes the slower it get to reach there.

Yes, exponentially. That's why 80 rep is so hard to reach. But ultimately it is meaningless, our top rep users are our worst users.