SEO optimization is a process that takes many steps.
One of the most effective techniques for getting higher search engine ranking is having back-links back to your website.
Back-links are links that lead users back to your website. Let’s say that you like photography and decide to join a photography blog. Every time you go to the blog and post a comment you will have a signature. If you write on a blog that allows links, you could place a link back to your website as part of your signature. This is the back-links that, as part of your SEO optimization, helps with search engine ranking.
It is also important to understand that not all back-links are the same and Google knows it.
Google ranks back-links in different ways, according to ranking priority, therefore not all back-links have the same search engine strength.
Generally, if you join a blog or a forum, with a large number of followers the audience is already created for you, and all you would need is to add your signature with the back-link back to your website. The more credible and popular the blog or forum, the more strength the back-links back to your website, giving you search engine power to boost your rank position.
Back-links work effectively together with our SEO optimization techniques. When you publish comments on blogs or forum sites, your own website attracts a bigger audience.
This is a course that I have came across and i believe it is easy to understand and very effective:
Remember: the key is to place a back-link on blogs or forums that are seen as authority by Google.