Retweeting epic content from credible sources on a daily basis will increase the trust and exposure of your Twitter account. That’s why you need to choose carefully what you retweet. TwitterGrowth will provide you with relevant tweets to take into consideration, but it’s up to you to decide what best fits in your audience’s interests.
If you do not want to retweet, you don’t have to. Just keep in mind that this can decrease the exposure of your account.