The days of having to have your site indexed on lots of search engines is over. There were days when you needed to submit your website to lots of search engines such as MSN, Yahoo, AOL, HotBot, Ask Jeeves, DogPile, Netscape, Lycos, LookSmart, EarthLink, Infospace, WiseNut, Webcrawler, and Mama Space. But these days you need only submit your website to one (or possibly two if you want your website to be indexed faster).
search engine

Google is all you ever need?

This is the biggest search engine in the world. It has the most users, the most websites issued, and is in more countries than any other search engine. All you need to do is create an XML sitemap via the free Google Webmaster Tools, and then submit it as per their instructions on the screen. If you are worried about your site not being indexed by other (less popular) search engines, then there is no need to worry, as many of them use the Google index to find their results.

What about Bing or Yahoo? ?

These are in second place to Google, and even thought they only hold a small percentage of websites compared to Google, they do have a little bit of regional support in certain countries. Bing and Yahoo are actually the same thing (search engine wise). They both use the same index, which means if you submit a website to Bing, then it can be found on Yahoo too.

Should I not submit my site to Bing/Yahoo? ?

You can if you want, but there is little need. If your website is on Google, then eventually it will gain backlinks. These are links from other websites to your website. All you need is a link from one website that is indexed by Bing/Yahoo, and eventually the Bing or Yahoo crawlers will find your website. Some people submit their website to the Bing/Yahoo index because sometimes it takes quite a while before Bing/Yahoo finds and indexes their site. By submitting the website to the Bing/Yahoo index, they will index your site in full (usually in one big crawl).

It may take them a few months to get around to indexing your website after you have submitted it to them, but the same is true of Google.

Should I not submit my site to all the other search engines?

Most of them use the Google index in order to find their results, so it would be a waste of your time if you were to submit your site to them individually. Even if the other search engines do not pull their results from the Google index, eventually they will get around to indexing your website in the same way that the Google/Bing website does. You can start adding backlinks to your own site from article sites or blogs if you would like the other search engines to index you a little quicker. It is also handy for raising your SEO (Search Engine Optimization) with Google and Bing/Yahoo.

Source: SEO expert Bangladesh