tryed and really been surprized what this champ can do. by following this guide

I think it's more or less self-explanating, but I just write it here:
Offense Tree: You could put your points to life steal if your opponent is an ap caster and you don't need wriggles lantern. But normally you don't need those 3% Lifesteal. More damage is better because you are harrassing all the time.
Defense Tree: This will give you more hp, mr and armor which you really need if your enemy manages to attack you. Caitlyn is really vulnerable and she really needs some resistance or hp.

Optionally you can put 9 points in Utility for higher walk speed and higher mana reg or less death time. But I don't recommend that to be honest. Only if you feel like that you don't need those resistances and hp.
If you have any more questions just ask me.

could you explain masteries?

I made a better experience with AD runes instead of armor pen, because your harrass will be a little burst in combination with your passive. Of course you can take armor penetration, but I prefer taking flat AD, instead of armor pen. Just try out and look what you like more

Your guide looks nice but what about Armor pen- runes? Maybe they are better than AD runes but i would try your build and give you a feedback later
Edit: I played with your guide vs Malphite and I was able to push hard but I had no chance to eal damage to that tank.We lost the game because of a feeder but it wasnt me ;)
And I like more the Armor-pen runes
But your guide isnt bad but its better if there is a tank/offtank in team. I would not use it when there is no tanky champ in your jungle;)

I'm a very unskilled player but after this guide i'm op in all games!

Good guide ... hehe

stop spamming my guide and stop writing senseless comments, please..

First of all, if u wanna correct my grammar or whatever u should work on your onw faults...

dear "shango",
it was a pain to read your comment. first check your grammar and spelling before posting some one's guide. now to the reason for your downvoting: you said my guide is pretty useless but you never tried it out and you didn't even read my guide. it says, that your team will have 2(!!!) carries, 1 bot carry and 1 top (solo cait). i wrote a guide, i spent some time in it and now a big troller approaches and tries to give a "fake-construcite comment". you are useless and don't deserve to be here!
My Opinion

hello
i have to say your guide is pretty useless, a caitlyn on top is not good then if the carry is top who is bot then??
your guide is also small your elo doesnt say anything about your playstyle.
If u imagine to write a guide, dont troll and write something more than now.
My Opinion