Understanding the basic structure of how search engines register Websites is crucial to succeed in search engine optimization (SEO).

It is one of the most effective web site promotion techniques, referring to improvements and changes made to web pages so that they conform to the search criteria utilized by search engines to rank and position listings.
'Spiders' are used by search engines to locate, index, rank, and list their findings, which take into consideration criteria such as keyword frequency, prominence, weight and proximity, plus keyword placement within the HTML. They like "content rich" or thematic text (sufficient enough to support the primary keyword phrase) about your products/services and use this to determine how relevant the page is to a searcher's request.

In general it is actually not necessary to submit a Website as the search engines will find it sooner or later, but achieving a higher ranking means a lot of work.

Search engine operators spend a lot of time trying to create a useful tool for finding related content on the web, and we have the highest respect for these efforts. So, never try to trick the search engines into listing your site better, as they will most likely view it as spam and penalize you.

Furthermore:

• Never list keywords anywhere except in your keywords meta tag. By "list" we mean something like - keyword 1, keyword 2, keyword 3, keyword 4, etc. There are very few legitimate reasons that a list of keywords would actually appear on a web page or within the page's HTML code and the search engines know this. While you may have a legitimate reason for doing this we would recommend avoiding it so that you do not risk being penalized by the search engines. When you integrate keywords into your title and alt tags, integrate them into a readable sentence that will not raise the red flag of a simple list.
• Never use the same color text on your page as the page's background color. This has often been used to keyword stuff a web page. Search engines can detect this and view it as spam.
• Never use multiple instances of the same tag. For example, using more than one title tag. Search engines can detect this as well and view it as spam.
• Never submit identical pages. For example, do not duplicate a page of your site, give the copies different file names, and submit each one.
• Never submit the same page to any engine more than once within 24hrs.
• Never use any keywords in your keywords meta tag that do not directly relate to the content of your page.
• Never use a search engine optimization or submit service that promises you a top ranking by optimizing your page and submitting and resubmitting your site to thousands of search engines. We have yet to find a service like this that really works, and many will use some or many of the techniques listed above, which can actually hurt, rather than help your site to rank well.