League of Legends: How To Play League Of Legends? Get Your Basics Right 

Turret:

These are the tall structure standing on each lane. These structures constantly fire bolts which damages any enemy unit in its range at an even rate. These structures primarily focus es on minions rather than your champion until unless you attack enemy champion while you are in its range or there is no ally minion in the turret range.

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Minions:

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These are also referred as creeps and are small computer-controlled soldiers that are spawned from both side of the map at an even rate. These minions then go into each lane and fight enemy minions. Minions prioritize fighting enemy minions until you attack a nearby opponent when near its minion or there is no ally minion then they focus your champion. Landing a killing blow onto minions grants additional gold which can be used to buy items.

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Inhibitors:

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These are the big structure which are located in the base at the starting of each lane just beside Inhibitor turrets. These structures when destroyed grants the opponent team Super minions which are more powerful the normal minions. Inhibitors re spawns after a fix interval.

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Nexus:

It is the main structure residing in either side of the base. The team who destroys the opponent's nexus first wins the game. Apart from that Nexus generates minions which goes into each lane.