A tradeline helps you improve your credit score so it will reap all the benefits a good credit score enables you to achieve. Without a good credit score, you will have limited access and services of your credit card, loan plan, and a higher rate of mortgages. In short, you will have to end up paying more money than usual.
But good tradelines on your account will help you achieve a credit score of 750 or higher in no time. When you buy an authorized tradeline from someone like Personal Tradelines, you are added as an AU to one of their credit card accounts, and it takes only 25-30 days to get your credit up to a good score.