Be very careful if an SEO firm promises you “Guaranteed search engine optimization”.
No one can guarantee a specific SEO result on Google, Bing, Yahoo or any other search engine. Matt Cutts of Google explains this in the video below.
Read Google’s Search Engine Optimization page, I quote:
”No one can guarantee a #1 ranking on Google.
- Beware of SEOs that claim to guarantee rankings, allege a “special relationship” with Google, or advertise a “priority submit” to Google. “
Another good resource is Google’s Webmaster Guidelines page; this is SEO advice direct from Google. Of course, professional SEOs know how to read between the lines and we don’t always do exactly as Google say.