Question about SEO
 

I�m just wondering what the difference is between directories which are supposed to be good as far as the search engines are concerned, and link farms which are supposed to be bad. They both contain links to websites?

To simply define SEO, I'd say it refers to the system of using online techniques and strategy for brand positioning, increase of site traffic and building online brand presence. SEO is undoubtedly a very important part of today's marketing system.

Both the techniques are helpful to improve your site.