Why is lasting hitting important and how do you effectively do it?
Performing a last hit gives you gold, and LOTS of it. Sometime even more than killing a champion. When the opponent team is good in survivability you NEED to last hit, so you can BUY items.
One good source about gold
What runes are really dominating in Ranked games?
None. You can go ranked with full set Gold/10 runes and kill them all or follow the champion's rune builds pages and lost.
You need to learn which runes works better for your champion.
How do people decide bans? Is it about popularity?
Not really. People usually go for the champion they are not good against.
Lots of junglers don't like to go against Shaco, so usually they ban him.
The best way to ban is:
- Ban the one who is good counter of your champion.
Akali is a Terrific anti-carry. so if you play a carry champion, she could be a GREAT ban.
What does GP10 mean?
Gold per 10 seconds items. They are great for Early game, and also for supports role.
Take a look here It might be of use for you.
IE, and WoTA?.