In order to ensure the most relevant search results for searchers, the search engines constantly change the algorithms to reflect new ways of interpreting off-page citations and backlinks and to penalise over-optimization.
While anyone can comment on blog posts, not everyone can build a natural backlink portfolio that consists of strategically and carefully building links. Establishing natural links through off-page SEO optimization is best left to the experts. The process involves:
Developing valuable, quality web content that naturally encourages links from external sources.
Building links using varying link and anchor text.
Using a range of related sites, articles, and blogs to build quality, related links.
Creating links of various forms, including contextual links, blogroll links and image links.