Difference between SEO and SEM ?

[loveguruindia]

Difference between SEO and SEM ?

[sadianisar]

Difference between SEO and SEM is:

SEO is Search Engine Optimization. A marketing technique which is used to optimize a website according to the rules of search engines.
SEM is Search Engine Marketing. A marketing technique which is a paid technique which is used to rank a website on the top of search engine by paying to search engines.