Synchro card help for Yu-Gi-Oh!

Well, yesterday I found this cardthe card type is synchro the example looks like this:I think I just should go to the point, please answer this question (if you can):what is synchro mean?how can i summon this thing?what is tuner?please help me, do your best! ;)

Synchro : http://yugioh.wikia.com/wiki/Synchro_MonstersHow To Summon : http://yugioh.wikia.com/wiki/Synchro_SummonTuner : http://yugioh.wikia.com/wiki/Tuner_MonstersI'm not very good at explanations.

Tuner means a monster with tuner as type, example machine\tunera Synchro summon is a special summon done by sending a face up tuner monster and any number of face up non tuner monster from the field to graveyard with the total of level equal to the synchro monster.example: Brionac is a lv.6 monster, you you will need a lv.4 tuner monster and lv.2 non tuner monster or a lv.3 tuner monster and a lv.3 non tuner monster or a lv.2 tuner monster and two lv.2 non tuner monster.

thanks for all of your help!i can't do anything to help you!but, thank you again! :D