When the Web was
was younger, the search engine field was
wide open. There were lots of major search engines, including
AltaVista, Excite, HotBot, and Webcrawler. This proliferation of
search engines had both advantages and disadvantages. One
disadvantage was that you had to make sure you submitted your query
to several different places, while an advantage was that you had
several inflows of traffic spawned from search engines.
As the number of search engines has dwindled,
Google's index (and influence) has grown. You no
longer have to worry so much about submitting to different places,
but you do have to be aware of Google at all times.