Here the Answer:-

SEO basically improves the ranking of your website on various search engines like Google, Yahoo, MSN etc… The ranking depends on visitors that visit your website, as many visitors the ranking moves upwards and hence increases the Online Brand Reputation (OBR) of the company, which directly or indirectly helps in promoting the business and hence selling the products, which ultimately helps a businessman to earn high returns on its Investment. SEO is continuously coming up with new updates and strategies in SEO the reason being search engines are continuously changing their algorithms of Search Engine Result Pages (SERP's). Definition of SEO "SEO stands for Search Engine Optimization, SEO is a strategy or technique which improves website ranking on various search engines."

SEO is basically of two types:-