Pay Per Click also abbreviated as PPC is an advertising method used to drive targeted visitors. PPC is one of the most effective method to fetch targeted traffic, however, since it is premium the results will be delivered till you are paying for it. When you stop paying for PPC you will see a falling trend in your traffic stats.
Search Engine Optimization also abbreviated as
SEO is a free method used to optimize a website/blog/forum for search engines. Though it is a time consuming process, however, it can benefit you in long run. So, most of the people opt for
SEO.