Credit cards have taken a major role since their creation, and are now as common, or sometimes even more common, than paying in cash, since purchases on the internet can only be made through credit cards and most shops now accept them. Among the many credit card names, there are a few that are accepted worldwide and are known wherever you go, and MasterCard is one of these names.
However, this website does no justice to it, being a raw-looking website with nothing to do except inputting a Reservation Number from a supposedly received offer, of which we are told nothing in the site. Basic deduction would lead us to believe that upon receiving said offer we would get a Reservation Number and a link to this site, but it is a shame that the site is useless apart from that. Unless you did get one of those numbers, this site is not worth your time. 
