Goggle made 30 changes during March to their Search algorithms.
Most important concerned paid back links, or spurious back links. Google sent out the following message to some websites:
"Dear site owner or webmaster of example.com.
We’ve detected that some of your site’s pages may be using techniques that are outside Google’s Webmaster Guidelines.
Specifically, look for possibly artificial or unnatural links pointing to your site that could be intended to manipulate PageRank. Examples of unnatural linking could include buying links to pass PageRank or participating in link schemes.
We encourage you to make changes to your site so that it meets our quality guidelines. Once you’ve made these changes, please submit your site for reconsideration in Google’s search results.
If you find unnatural links to your site that you are unable to control or remove, please provide the details in your reconsideration request.
If you have any questions about how to resolve this issue, please see our Webmaster Help Forum for support.
Google Search Quality Team"
Google also tweeted “ Is your site doing weird redirects? We just sent a "your site might be hacked" msg to 20K sites, e.g. http://goo.gl/S6Ptk”
Google are also warning about excessive SEO on anchor text.
We all want to be on Google and Bing first page. The way you get there, and more importantly how you stay there is hard continuous work. Fortunately the formula to use to achieve your goal is simple:
Good relevant content, Good Back links.
Over SEO optimisation, fake forums, bought back links, and all the other dubious methods that were and still are being used, will get your site penalised.