As the term implies, directory submission related to the process of submitting your website to a directory.
A web directory is a site that contains links to different websites, which are categorized according to various categories and subcategories. For effective directory submission, you need to submit your site to the exact subcategory available. Some of them allow submitting sites free of cost, while some directories need reciprocal link and some are paid.
There are two ways to do directory submission. One is through manual submissions and the other is with the use of directory submission software. Manual directory submission is one of the most consistent and successful solution.
Directory submission procedure is followed by most websites as submitting a website to a directory is the most reliable way to optimize your site. While submitting website to directories, the probability of web site coming in search engines increases as directories naturally rank high in the result page of search engines. So directory submission is used by SEO experts as a common web promotion tool.
There are certain guidelines to be followed for directory submission:
1.    You should submit the site in the most appropriate category based on the theme of your website.
2.     See that the directory has the relevant category or classification to meet your business needs.
3.    See the page rank, instances and back links etc of the directory to which you are submitting.
4.    If it is a new directory see whether it is cached or not and see the on which date it cached.
5.    See the status of other sites which are submitted in it.
6.     It should be noticed that directory uses optimized search techniques and past performance of directory has been good.
Submission in quality web directories can increase traffic for your website. This helps to promote your business. It helps in the visibility of website in the World Wide Web and makes more publicity. Moreover submission to directory helps in increasing back links and instances of your website.
Thus directories can be used as a promotion techniques to promote your E- business.