If you desire to attain high ranking in result pages of the major search engines on the web it is extremely essential that you build up links with well known websites. Link development is absolutely essential part of the success of your website and also a major part of the optimization services offered by you.  

You can also develop a very high quantity of good quality links through multiple methods that constitute essential parts of the seo moves.   Such link development could be one way links that come from the web directories or other related sites or could be a bilateral link where connection is exchanged with other websites.  Lastly they could also be free directory submissions.  

Other methods of link building include writing of relevant articles and their submission to the web directories.  In result the web directory will automatically link other sites that find your contents relevant with your site.

You may also post blog or create them so that others who read them becomes interested to surf to your website.  This is a type of indirect link building.  Press releases and submissions can form important link building tools. This also includes social medial optimization processes or SMO. 

The process of submission is that the agency you engaged for the search engine optimization will submit your website to the major search engines as well as the directories like the Google, MSN, and Yahoo, ASK and so on. Professionals do also create and submit sitemaps so as to avoid any confusion regarding your website with the search engine concerned to make the link easier.