“Search engines are web database that are automatically compile their indexes. Search engines work by dispatching programs, commonly described as robots, spiders, or crawler to collect web pages.” (James R. Shearer, MA, 2000).  Search engine is based on a set of tools, techniques, skills and algorithms that organise search results for their users.

Businesses which relay heavily depend on website for advertisement and sale, are struggling to reach to target customer. As we can get thousand of website on around same keyword from Google or from any other search engine, the problem is put company website on top of search engine or at least in top 20 results. To do so we need the help of technique called Search Engine Optimisation (SEO). There is no single definition for SEO, one of the most simple definition of SEO would be ‘it is a process where you try to divert or divert target users toward your web site by the help of search engine(s)’.

As Web search now represents a significant share of web activity according to a survey about 250 million of pages being search just by Google and round about 600 million total number of search is estimated per day by all search engines.  The beauty of the search engine is that most of them are not required any sort of registration to use them, any one any time can start getting benefits from them straight forward and most of them are free. (Vine, R., 2004). In this chapter will be discussed the architecture of search engine, its importance, the types of search engines and disadvantages of search engines. Submit your website for free submission in different 40 search engins. The following are the top 10 ranked factors across the 5 categories:

1. Title Tag - 4.57
2. Anchor Text of Links - 4.46
3. Keyword Use in Document Text - 4.38
4. Accessibility of Document - 4.3
5. Links to Document from Site-Internal Pages - 4.15
6. Primary Subject Matter of Site - 4.00
7. External Links to Linking Pages - 3.92
8. Link Popularity of Site in Topical Community - 3.77
9. Global Link Popularity of Site - 3.69
10. Keyword Spamming - 3.69

Search Engine Optimization Tools Free SEO Tools For marketing and optimization purposes
Submit Free Submit your site to 20 popular search engines for free! Need more hits? Then add your URL for free! Submit your URL to 20 search engines for free with a convenient submission tool. Adding your URL to multiple search engines from one spot was never easier! Search Engine Marketing and SEO Tools
DIY Meta Tags DIY Meta Tags Create correctly coded meta tags yourself for free! Don't know how to code meta tags correctly? With our meta tag creator, you can do it in seconds!
Free Position Check Tool Check your search engine ranking on Google, Yahoo! and MSN. High rankings are the key to top search engine traffic. Find out your website ranking on important keywords and search terms. It’s simple, fast and free.
These all SEO Tools coming soon, so keep in touch. Search Engine Optimisation is alabout keeping eye on your seo techniques to make sure which one working for you and which one are not.
Meta Analyzer This tool will analyze a websites META tags. Analyzing a competitors Keyword and Description META values is a good way to find ideas for keyterms and more effective copy for your site.	Google Dance This tool will query Google's 3 main web servers, showing the different statuses during updates. Watch Google Dance.
Page rank checker, it free to check your page rank PageRank Check
Check back link and page popularity of your websit with this free tool no need to give email or any detail it simple and affective way of checking page rank of different pages of website. you can also check the most important keywords for your website and detail of your website traffics, complete analysis of your website Site Analysis