The Changing Trends In The World Of Search Engines
Until recently the practice prevalent in the world of search engines was that an advertiser who was making the highest bid for a specific keyword was ranked as the top contender in the results page. The bidders were accordingly listed. The AdSense information always contained such list of top ranked advertisers.
There is however, a sea change of late in the ad world with the concept of quality score coming in. Especially in leading and largest search engines like Google, Yahoo, and MSN are all bending towards accepting this system now. The search engines adopt a practice of limiting the number of ads to be displayed on a search page to less than 10. Ordinarily you do not receive a Pay Per Click Advertising response unless and until you figure among the first three in the list.
One point that favors you as an advertiser is that the competition among the PPC search engines is so fierce that many of them even do not require you to have a minimum deposit. A few of them might require money to the extent of $25 to $50 but that is only in case of the smaller search engines and are identified in most of the Search Engine Marketing Blog.
If you desire to have information about the current status of the search engine market, you can find out the same from the Latest Search Engine News.