The majority of people worldwide rely on a small number of US-based search companies. Yahoo and the Open Directory each have international branches of their directories, and Google has versions of its search engine for many different countries.
If you can get listed on a smaller regional or local website directory, it will help your search engine placement on all of the major search engines by increasing your "popularity" (the number and quality of links to your site). Some local directories provide direct links to websites listed, while others use scripts to track clicks on the sites listed. If the directory is using a script, your listing in that directory will have little impact on your ranking in search engines that factor in popularity. Still, that link may drive a few visitors.
The amount of time you will have to wait will depend on which techniques are employed in your efforts to optimize your website. Assuming you've rebuilt your site and loaded it onto your server, replacing the old files, you need to be prepared to wait anywhere from a few days (if you use a pay-for-inclusion service) to a few months.
If your site has already been on the Web for some time, and is already listed in all of the major directories, then you will probably begin to see improvements in your search engine rankings within 4-6 weeks.
There were 2,970,000,000 web pages indexed by Netcraft as of February 2007, and 70,392,567 websites were indexed by Yahoo! as of August 2005. These are the most recent figures:the longer or later on in the year it goes there will be more websites so you could check it one day and then the next day check and 1000 more sites could be up
Google announced on 7/25/2008 that it had indexed over 1 trillion unique URL's.
Every day, more sites get created. That means this answer will change fairly rapidly over short periods of time.
Google is by far the most used search engine today. In addition to providing Web search at its home page, Google.com, Google also provides web search results to several of the most popular Internet destinations, including Yahoo! [Note: As of 02/18/2004, Yahoo! no longer uses Google as its default search engine.] and AOL. Google does far more than 200 million (>200,000,000) searches every day through Google.com. That number was reported by Google all the way back in 2001, and they have consistently refused to update it, but you can be assured that Google does substantially more than 200,000,000 searches every day through Google.com.
In a general sense, link popularity is determined by the number and quality of websites that have linked to your website (often referred to as "backlinks"). The effects of link popularity are threefold: (1) links to your site give Web users ways to find your site while visiting other sites; (2) links to your site give search engine spiders (robots) trails to follow to find and index or re-index your site; (3) links to your site are essentially votes for your site in search engine ranking algorithms, but not all votes are counted equally.
When two sites are equally well optimized for search engine performance on any given keyword phrase, the search engine will generally rank the one with more link popularity above the other.
Webmaster 23rd of May 2012
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