Scale means the ability to reach the right contacts instead of either blasting emails to the thousands of people in your database or manually reaching out to each individual prospect.
Account-based marketing is about identifying your best-fit prospects, then focusing all your efforts on engaging these prospects on their own terms. For B2B marketing, this is essential, as it's the most efficient way to use your time, energy, and resources. You target businesses that are most likely to buy from your company. This is very different from old-fashioned B2B marketing.