What does this mean? In this case, it means demonstrating your authority and/or expertise in the subject area on which your marketing will focus. So if you are looking to sell online poker affiliate programs, link to good-quality news content that you have written yourself, or that you have seen on a trusted source, and give your readers something they did not have, or did not know, before. This is a good, positive, way to establish your brand.
The online lead generation is a multi-billion dollar industry. Done right it can be far more profitable than many imagine. Everyone that I know that is in the business and knows what they are doing, for the most part, does 6-7 figures. While that's a huge range, much comes to one's ability to scale and effectively build / manage the infrastructure needed to scale.