Linkbuilding uses it to make the site visible and to promote several methods. The main one is the creation of backlinks to pages on other sites. These should be especially high-quality, highly rated by search engines, and content relevant to the sites we promote
Backlinks can be exchanged or purchased. The best and most effective is to use both of these options for linkbuilding. Without investment, it certainly won't work. One has to realize that the same steps are taken by his competitors and should always be a step ahead if he wants to succeed.
Other options and steps used by linkbuilding is to register pages in catalogs, create supporting websites that will link to our site, write PR articles, write blogs, and promote pages in forums, discussions and social networks.