Basically there are two ways to increase you reputation in steemit

1. Write posts that have quality content . Your repo will automatically rise once people show love towards your posts as upvotes. You require a bit of patience here.
2. If you have enough money and you wanted to increase your reputation faster start using bots. Buy SBD/STEEM with your fiat and send it to your wallet, then start using bots. Bots are the steemit accounts which upvote your posts by taking money from you.