Latest reports suggest that 8 out of 10 people find websites and in turn products, companies and services using this method.

There are thousands of search engines on the Internet, 99% of these are basically unheard of. Probably less than 1% of all available search engines / directories really count.

In our opinion there are just 16 search engines worth getting listed on, however any listing of your website anywhere will always help. But beware of FFA sites. Known as "Free For All" these sites are Email Collectors first and search engines second. 

If you sign up to these, you will be inundated with spam as an e-mail address is always required. Your listing will probably only exist in FFA Directories for a few hours as FFA sites are submitted to by automatic means. So your site may be listed one moment and pushed off by the barrage of submissions the next.

Search engines work on keywords and key phrases. And each engine has a different criteria for what is honestly and genuinely accepted - you can't just fill pages with repetitive key phrases over and over again - not only will this make your web design terrible, it will get you banned from the search engines as a spammer.  

Using Google, the top search engine as an example, a visitor looking for second hand car dealers in London, will simply enter keywords associated with the search criteria. In this case :-

"Used or second hand car dealers in London"