Anyone with a business online needs to understand the importance of links. Not only do they build authority for your business in the eyes of search engines (and lead to stronger rankings), they also deliver visitors to your business.
This article by Marketing Sherpa 7 Traffic Building Tips to Boost SEO is one of the best educational articles on link building I have ever seen. It is thorough and accessible, and packed with the sort of tips that will give you ideas on how to build links for your business.
Take notes as you read it, and when you have finished make sure you pick 3 action items to implement in the next 24 hours!