Backlinks are very important to promote a website, whether it is to get affiliate clicks or buyers. Google is the main source of traffic to almost all the websites in the internet. If you would like your site to be seen, rank it in Google, but unless the ranking is at a decent level, there is no use in doing it. No one is going to go to the tenth page in the search engine results. It is not possible. If your site is at the first or maybe the second page in the search engine result, it is good, and use backlinks for this. The more promoting you choose to do, the more visitors you get, it is as simple as that.
Do you already have a ranked website? Then maybe you want to get the best ranking. If you want to be the first, then the necessary input has to be given. When you are targetting Google, backlinks are the best inputs. It might not really be helpful for any other search engine, but as Google is the most used, you don't have to worry about that. Backlinks might take some time, so it is crucial that you are patient. Don't give up after a few days.
Backlinks can be defined as a link, when clicked, leads you to your main website. You can find them at directories and social sites. This is a link, that has some content that has the link of your actual website. There are many article directories that allow postage of links in their articles. Depending on the standard, people will visit your site. Google is the only search engine which makes use of backlinks. Your website is the sole source of ranking for the other search engines. With Google, you will not obtain a ranking unless you have enough backlinks.
The more backlinks you've, the greater ranks you can get. Google will bust you for doing anything that is not accepted. Every article and message needs to be 100% unique. If you post the exact same message in most place of the social website, then don't expect the same number of backlinks. All of them are considered as duplicated content, and Google hates duplicated content. They will disregard all of the articles, as well as take only one of them as legitimate backlink. Don't spend your time in doing things that won't be accepted.
If you prefer forum postings to get backlinks, then you can do it. Block commenting is also a good method. Post good replies to the posts and then add your website link with it. This method gives good backlinks.