This is a pretty new chess site as compared to other sites like chessbase but its grown tremendously off late and I feel that it’s the best site currently for watching online games. The reason I say this is because one can follow all the latest top level games along with LIVE Commentary by Grandmasters! Also the games are accompanied with LIVE engine analysis( they use the second best engine in the world: stockfish 6) which is very much helpful for amateur players and also helpful for other players interested in making judgments after having thought about the position.
This site is not just about online games but we can also play games against pretty strong oppositions. So its a very useful practice arena as well.
Along with this we also get a lot of video lectures about openings, middlegames from a lot of top level grandmasters as well as strong international masters. There is an introductory video by non other than the former world champion Vishy Anand himself who teaches basics of the chess game for free and also gives tips for improvement.
This site has the best articles about latest tournaments. I say the best because they are very informative and pretty entertaining as well. They help build chess and they give exact information about the games and tournaments. I am Pretty happy with the articles section as well.
Chess24 also provides Android app which ive been using for quite sometime to follow all the latest top level games. It’s a very nice app although I feel it can be made better by improving the speed of loading games.
All in all its a very good site, probably the best right now in the market. Do check it out!