You have done your good job of search engine submissions, both automated and manual. However, your website URL has still not been indexed or it was initially indexed but has now disappeared. What could be the possible reasons? You can get an SEO expert review that states the reasons.
 
The first golden word you must remember is patience. Generally, when you submit your website there is a latent period which the search engines need to index your website. So, you must wait for that time before you start considering your submission process a wasted effort and get the expert review done. However, if you want your URL to be indexed with least possible latent time, you may consider the paid submission as option. Some search engines like AltaVista and Inktomi have this option. 

It is quite possible that you have already been indexed but the URL is buried deep under the depth of search engine results. Remember, if your website is not tweaked for good search engine optimization, it may not rank even at the third, fourth or fifth page of search engine results.

Before you submit your website, get a SEO expert review to make sure that there are no broken links and no page is missing. Every single page is vital to get good search engine rank. Also, some search engines do not acknowledge the presence of web pages that cannot be mapped from the home page of the website. So, all your effort to develop doorway pages for easy website optimization may go in vain.

Link popularity is an important factor to appease search engine crawlers, especially that of Google and HotBot. If your expert review reflects that link building effort has not been efficient and you have no external link pointing to your website then most of the search engine may not index your website URL and even if they do index it, they may remove it from their database if your website has still not received any external link.

According to SEO expert review by the best website optimization experts, one big search engine optimization blunder you can do with your website is have a kind of registration or password. Search engine crawlers are very basic algorithms in the sense that they cannot fill any form. Therefore, it is better to have static pages to ensure website indexing.

Free website sources such as geocities are not really favored by the search engine algorithms while indexing URLs. Most of them have in fact, stopped indexing such websites. Even if they index these websites, only limited pages are added. Therefore, buying an independent domain name is a better option when it comes to search engine indexing and finally search engine rank. When you get your website hosted by a website hosting company make sure that you are not sharing IP with any other URL. Your URL will get banned from the search engine database even before you knew what happened.

As the old saying goes excess of everything is bad. Same goes with submissions. Most of the search engines have set a limit to the number of submissions they would tolerate in a day from a particular website URL. If you cross this limit, then all your day’s work may go down the drain. Make sure you hire the right kind of search engine optimization firm like WSO that knows its job well.

For search engine crawlers simple is better. These algorithms are not appeased by how well your website is in its appearance but how nicely it is optimized. Static pages are preferred over the dynamic pages. Now, this does not mean that if you add an essential JavaScript to your page, it won’t get indexed. The page still gets indexed but only that part which is outside the JavaScript. Also remember that the multimedia formats, Java applets and XML codes cannot be read by the search engine algorithms. The size of the page is another consideration. If it exceeds 50 to 70K limit, it may time out before the spider can even index all text.

One very good trick to ensure all the pages you want get indexed is to create hallway pages or a site map. They get your website indexed and fetch attention from search engine crawlers to earn good search engine rank. Trying out various search engine optimization tricks is not bad but make sure you do not over do them. There are many website optimization techniques that seem like an easy way up but the crawlers take them as an attempt at spamming and as a result do not index such pages and websites.

Search engine algorithms are not perfect piece of work. Even they are subject to technical bugs and errors. Only way to overcome this factor is to resubmit.