Improve Your CreditHistory Lesson: Why Is Credit Length Important?Establishing good credit behavior is beneficial for a consumer — doing so over a long period of time is all the more advantageous. As is common with many things in life, the longer you excel in something, the more proven a track record you will have built. That’s why the length of a consumer’s credit history is an important aspect in determining their creditworthiness to credit card companies, lenders, and any other party that would access a person’s credit report.