Answer 1

STAB stands for Same Type Attack Bonus, and it means that whenever a Pokemon uses a move that is the same type as itself, the move is boosted by 50%.

Example: If a Ground type such as Mamoswine uses a Ground type move such as Earthquake, it will have 150 Base Power with STAB, as Earthquake (whiners :P) usually does 100 Base Power, and 50% of 100 is 50, so 100 + 50 (STAB) = 150.

Comments

@Flare: All I did was edit an example in, and I started editing it before your post appeared.
@JCM: I never said anyhting about tiers and earlier in the post I said Earthquale, so it should be rather obvious what EQ is.

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If the person doesn't know what STAB is, don't expect it to know tiers, or even less EQ.

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I know, but still xD

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Fine, happy?

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Wow! I guess that makes teaching pokemon moves that match it's type totally worth it!

Answer 2

Read this Link for a great explaination.

STAB, I basically when a Pokemon of the same type uses a move of the same type. For example an Infernape using Close Combat will get STAB and and Infernape using Ariel Ace will not. Dual types also work. So Infernape using Flamethrower will also get STAB. What STAB does is it adds half of the moves Base Power onto the BP.

Read the link. It is great and that's where I learnt what STAB was.

STAB = Same Type Attack Bonus

Comments

This is bad info.

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How? It tells you exactly what STAB is.

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Seriously, how is this bad info?

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You explained it with so much irrelevant and complicated info for a beginner noob.

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I didn't consider it bad, it's a bit simpler than the other one.

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this isn't wrong

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Still bad info.

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Thanks for fixing Flare. i removed the down-vote. It was bad because he said that the bonus was double. i.e. Fusion flare woulbe be power 200 instead of the 150.

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Yeah, I forgot the concept but I knew it...
:D