NPS® is the optimal metric for loyalty and customer satisfaction, but the Net Promoter Score can do a lot more. If used correctly, the NPS can play an important role in your customer acquisition and sales processes and significantly accelerate the growth of the company by focusing on both customer retention and conversion of interested new customers.
If you search online for information about increasing the conversion rate of your SaaS products, you will find a variety of sites that will show you techniques to convert more website visitors into trial users and paying customers. Often these tactics are successful - when implemented effectively, they can increase your overall conversion rate.