SEM stands for "search engine marketing" and SEO stands for "search engine optimization."SEM is the all-encompassing broad phrase that includes SEO as well as paid search activities such as Google AdWords purchases.SEO, on the other hand, is simply a subset of SEM.Some people mis...

Link farming is process of exchanging reciprocal links with Web sites in order to increase search engine optimization. The idea behind link farming is to increase the number of sites that link to yours because search engines such as Google rank sites according to, among other things, the quality and...

"Keyword density" is simply the frequency that the word occurs given as a percentage of the total number of words.in whole content..