It is not at all necessary if you consider to do a complete SEO Optimization. It is adviceable if you do so.
if you build backlinks to your site it is not needed to submit the site to search engines. By building backlinks your site will be found , crawled and indexed by the seach engines
search engine submission is mainly for new sites. search engine submission is not a necessity. As you do SEO activities , develop back links search engines can crawl and find you easily and your site gets automatically listed.
Yes, it is very important to get traffic and improve you SERPs of your blog or website. You can boost your blog visitors as well.
If you only mean submitting your site to google, I think it's not that necessary. If your link building is good, google will find your way instead. IMO, SE submission can take a month to be accepted, while building instant quality backlinks can get your site indexed in just a day. (Mine took actually just an hour with help coming from quality list of social bookmarking sites)
No, it is not necessary to submit your sites to search engine. You can get your sites incexed by Google naturally.
Yes make sure you submit your site to Msn yahoo Google and any one else you can find its all free.johnc
its not mandatory but if you submit your site to different search engines then your site can get easily indexed and cached by various search engines
You don't need to submit anything anywhere, search engines are designed to find new urls - Google even recommends it self that you don't need to "Inclusion in Google's search results is free and easy; you don't even need to submit your site to Google. Google is a fully automated search engine that uses software known as "spiders" to crawl the web on a regular basis and find sites to add to our index. In fact, the vast majority of sites listed in our results aren't manually submitted for inclusion, but found and added automatically when our spiders crawl the web." http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=34397 And do not ever pay anyone for search engine submission - it's a complete rip-off.
its not compulsory but you have have to do search engine submission then u have to increase more SERP and easily index by the google and other major search engine........