Travel website ratings

we are curious to know why a certain tour operator page on a travel ratings website is ranked very highly on google. they are page one for main keywords. the travel ratings website has a few hundred tour operators listed. none of these pages are ranked highly on google, just this one operator. on the travel ratings website they are smthg like 36. on google for the keywords which are our business, they are 3 or 4. their actual website is page 4 or 5 on google. we also have a few questions about how said travel ratings website manages rank by algorithm. it seems to be by revie, but our own rank is fairly static. for more details, please message us.