I posted this on another thread but thought it might help here.

First example: Google the word "cle" or "clé". That means "key" in French and is a pretty generic term (with or without the accent on the e.) Now look for the website cleservice.com which usually is in the first few search returns, and look at the bottom of their page. Follow a few links.

Best example: now Google the word "montre" That means "watch" in French and is also a pretty generic term. Now look for the website tictactime.com which is normally 1st and look at the bottom of their page. Follow a few links.

There are about 150 links to 150 pages each link has the word "montre" twice in each link on the bottom part. Each linked page has the same links at the bottom. 300 x 300 = 90000. There are a further 120 links on the left side each with the word montre in the link twice. No wonder they are number one with "MONTRE"!!

So that's the proof how good backlinks work and that 90,000 seems a large number!