Clash Of clans game is about the army and war between two kingdoms in these games other army attack your clan and you have to save or defense your clan. And you can also attack the other clan and loot all the treasure of the clan.
Games is good and the concept of the game is about war between clans, you can participate in the weekly tournaments of the clan battle. and earn so much treasure of the other clan.
You can build your own army and other important defensive equipments you will see in the Games.
Usefullnes from the games is not much only you can make strategy and play a mind games by setting defensive system and attacking other clan by the tricks.
But the game is Very addictive and I request the student to not play in exam times these games because due to games activity and other things which make you in the games is that you have to see all your status of the game and other such as rebuild of the army camp, strongly defense system, when other clan attack you that you have to immediately reconstruct the clan of yours so that no other will be attack again you These all thing you have to keep in mind and these all take your Time and you see every minutes your game so I request not to play on exam times its good for you because it does'nt Dustract your minds from the study.
all the best and good by
Hope you like my review.