Some organizations and events give out awards to casinos that do well each year in a certain category. For example, askgamblers has their own awards, casinomeister has their own and there are some others.
If you're looking for a new casino to try, do you ever notice if it got any awards and would that even matter to you?
Consider it to be similar to movies/film awards like the Oscars. There might be a winner of "best movie of the year". Which honestly is the best movie for the judges but doesn't always translate to the masses. Best to try all the top casinos you find and compare the pros and cons and decide for yourself. Reviews do help in a lot of cases.