Mamma.com was a search engine founded in 1996 and was at one time quite popular for search. It was bought up by Copernic in 2005 after the dotcom bubble burst. At one time, the page you are reading now contained detailed instructions on how to get into Mamma.com, and was useful in that regard. It is now in our archive section.
If you go to mamma.com now, you will find it has morphed into "Trust Mamma," which offers coupons and is a review website with millions of reviews on it. I'm uncertain how relevant it is now that Google offers a space in which to review websites. The coupon feature may be handy for you if you are into such things.
Click for more info on Trust Mamma.