The final aspect of SEO is backlinks. In the SEO industry, there are many services that will advertise affordable links back to your site at a large volume, typically through blogs, directories & forums. This is not long-term SEO.
Some agencies will use what is called a 'Private Blog Network', which are sites owned by the agency. This is essentially a rented link that can be removed at any time. We highly advise against this.
We conduct custom outreach to acquire guest posting access on media/blog sites in your industry. We find that this is the most genuine way to acquire backlinks. It's also heavily preferred by Google. We focus on quality over quantity.
Please note that it's extremely important to publish our weekly blog articles, if you don't it's very difficult for us to acquire backlinks.