SEO is still the best source to build traffic and business. Link building is the only way to improve search engine ranking and to improve overall traffic. Pay per click in search engine advertising, the advertiser would typically bid on a keyword so the PPC rate changes. Increase traffic do social bookmarking on high page rank websites, do some blog posting for your website, for instant traffic you can use social media sites for increase traffic, like Facebook, Twitter, LinkedIn, You tube, Google plus, its helps to increase traffic.