What is the difference between guest posting and PBN links?

Most businesses use different tools to help market their business. One of those tools is the company blog; by posting articles every so often a company is able to not only let customers know the company’s latest news but is also able to communicate with its customers, potential and current. The blog also helps to establish a web presence; as the blog gains more entries it becomes more useful for purposes of search engine optimization. While there are a number