What is the use of submitting in lots of search engine and Building a link in Directories and in other links?

Question

please give answer for both individually

Answer 1

Links pointing to your site is considered a vote by the search engines. The site with the most positive votes wins!

This has changed a bit recently as one-way links are much more important than exchanged links. The best way to obtain one way relevant links is:

Directories: Try to find some odd directories that are like your site.

Articles: Write informative articles and have them distributed. The more sites print your article online, the more links it will generate.

Press Releases: Press Releases, if submitted to the right press release directory, will create high quality inbound links for your site.