Recently google has changed its algorithm. thats why i got major rankinges for my websited. I want to know this algorithm means and effect of algorithm change in seo.i mearly know that this change is about site's content issue
yeah, you are right that google algorithm has been change. More information you can visit googlblog.blogspot.com . There you can found full update information.
YES,Matt Cutts posted that Google has changed their search algorithm to focus more on original content. Below is an excerpt from his post: "My post mentioned that “we’re evaluating multiple changes that should help drive spam levels even lower, including one change that primarily affects sites that copy others’ content and sites with low levels of original content.†That change was approved at our weekly quality launch meeting last Thursday and launched earlier this week. This was a pretty targeted launch: slightly over 2% of queries change in some way, but less than half a percent of search results change enough that someone might really notice. The net effect is that searchers are more likely to see the sites that wrote the original content rather than a site that scraped or copied the original site’s content."