Clash of Clans is a famous strategy game for smartphones and tablets. Its mecanisms are similar with other war strategy games like Age of Empire. You start with the bare minimum of resources and building, and you need to build other ones and upgrade them to expand your village. Of course, you need to collect resources first, they are two in Clash of Clans : gold and elixir. Then, you should build your defense, there are a lot of defenses in Clas of Clans : walls, canons, archer towers and mortars to shoot from distance, traps like the hidden bombs or crazier : srping traps. By upgrading all theses buildings your village will soon become a stronghold and you'll start thinking of the best layout to use. Moving buildings is really easy (drag'n'drop) and it's important to choose the right place for every building and defense, as you can't defend yourself your village like in most of other strategy games like Clash of Clans. Be right prepared because enemies could attack your village and plunder your resources during your absence.
Of couse, in the other side you can launch attack too. The training of troops is also very easy : one building to create them, another one to upgrade them, and both buildings could be upgraded to train better units. Once you have build your perfect army, launch an attack againt the goblins (single player) or against another random player in multiplayer mod. The attack is very easy to manage, you just have to put your troops next to the enemy's base and lets them crush it. Your troops would choose the first buildings to attack depending on their levels, so it could give bad results, and it's little bit annoying : Once you have placed your units you can only watch and hoping for a win. However you can be helped by your allies, their units will defend your village if you are under attack.