Google Released Two Ranking Algorithm Updates

If your web page rankings dropped on April, 19th, then you have to improve the quality of your web pages.

If your web page rankings dropped on April, 24th, then you have to remove all spam elements from your web pages

Facts That Google Considers Spam

Google doesn't like web spam at all. Some facts are highlighted below:

• The first fact for spam is a page that is stuffed with hundreds of keywords in a comma separated list. Google doesn’t want that type of pages in the search results.  

• The second fact for spam is a page that has normal text. However, the text contains keyword optimized links that are totally unrelated to the surrounding text. 

• Other things/facts that Google considers spam are linking schemes, misleading redirects or purposeful duplicate content.