A very important part is played by Meta tags description and keyword prominence because of the fact that they are indexed in a particular way or fashion . The search engines at the top will not index keywords that are considered to be spam .   They will also not index words that are considered stop words .   Stop words include words like the, or, or of.  The reason this is done is to save space and speed up the search process. Search engines themselves do not index images, but search engines will and do index image descriptions, Alt text and the text that is left as comments.

The search engine porgram or software is the final part. Once someone requests a search on a keyword or phrase , the search engine software searches the index for information that is relevant to the search term requested. A report is then rendered by the software back to the person who made the request with the most applicable web pages listed in the first position and then down the list.

Listings of websites are collected by these directories into a particular industry, subject categories, quite often they will carry a short description of the data requested on the web site . Inclusion in a directory requires that an individual manually submits the information to the directory producers. Quite often you will find researchers and visitors who are on the internet that will use these directories to locate relevant sites and information sources.

Another reason of importance is that the crawler engines very frequently locate websites to crawl through their listings and links in directories.  For this reason it is a very good idea to submit your website or websites to search engine directories.

The big boys of the search engines like Google get over 200,000,000 searches per day. Think about that, and it's probably well over two hundred million searches per day, at the time this article was written .  Yahoo is the 2nd largest with about a third of what Google receives in searches, still a very large number of searches .

Don't take for granted the role of meta tags and the power of search engines .