Building links through reciprocal link exchanges is a simple yet very powerful website promotional tool. If done correctly, increasing your linkage will: Increase your traffic significantly. Improve your visibility in the search engines. Provide an added resource to your website. Save you a lot of advertising money. Save you time. www.sem-service.com
Yep. Link building has many benefits. There is no doubt that link score is one of the most important factors the major search engines consider when determining where websites are ranked. Just simply, if you have many links pointing to your site from other sites, your content must contain quality, important information. A link is like a vote . Although links from important 'authority' sites carry more 'vote weight', ultimately, total 'link/vote score' is one of the heaviest algorithmic factors considered in rankings. Sites with links from trusted sites are 'trust-worthy'.
Google gives much weightage to Threeway Links. If you build links from the spamy/droped sites it will affect negatively.