Runes

Introduction:

Runes are used to increase some of your stats. For example, armor and attack damage. From level one you get one rune page that you can use. Rune pages can be bought in the Riot Store for 6300 IP each, on special occasions you can get two for the same price.
As i mentioned before, you should avoid buying runes until level 20 because at this point you can buy 3rd tier runes.

• 1 tier runes - level 1 to 9
• 2 tier runes - level 10 to 19
• 3 tier runes - level 20 to 30

Runes get better with each tier, so why waste your heard earned IP? on runes that you will give you very little stats and which you will need to re-buy. Rune slots are open every level.

So moving on, you have 4 different types of runes:

•  Marks: The red runes. Offer you armor and magical penetration boosts. Very useful runes for DPS champions and mages.

•  Seals: The yellow runes. Offer defensive boosts. Very useful runes for tanks and mages.

• Glyphs: The blue runes. Primary glyphs offer magic boost. Very useful for spell casters

•  Quintessences: You can only have 3 because they are the most powerful runes out of the five. 

Classic Examples of Rune Pages:

ADC:

• Marks - It's better to tack just attack damage because it will help you with last hitting. Or you can you can also take armor penetration, it will lower the armor of your opponents.

• Seals - Armor runes are mandatory for all rune pages actually, it's just the best option for now.

• Glyphs - Magic resist per level/magic resist. Will give you more mr to survive fights. 

•  Quintessences - Armor penetration/Attack damage/Lifesteal. Your choice.

Bruiser Top:

• Marks - Attack damage

• Seals - Armor runes are mandatory.

• Glyphs - Magic resist per level/magic resist if you lane against AP take the straight magic resist.

•  Quintessences - Armor penetration/Attack damage/Lifesteal. Your choice.

AP Mid:

• Marks - Magic penetration

• Seals - Armor runes are mandatory.

• Glyphs - Magic resist per level/magic resist.

•  Quintessences - Ability power

AD Jungle:

• Marks - Attack speed, for faster clear of the jungle

• Seals - Armor runes are mandatory.

• Glyphs - Magic resist per level/magic resist.  

•  Quintessences - Attack damage/armor penetration/movement speed