League of Legends Support Guide

there are 2 main types of supports in league of legends aggressive and sustain supports 

Aggressive supports

they are supports who have alot of initiates and cc that make getting kills easier for the adc like braum and blitzcrank these supports are usually tanky

Sustain Supports

they are supports who have a kind of heal and very high poke to help your adc these supports are great in sustain meaning that any damage they would take from the opposing enemy would be just negated by the heals examle; sona - soraka

How Supports are generally played 

the first thing you wanna do is never take any creeps from your adc as you will be making the game harder for them because as a support you don't need gold 

second you must focus on warding bushes that are in the game to avoid ganks 

third you must ward major objectives like dragon(grants the team gold upon killing) baron nashor

(Grants the Team a Major buff)

fourth as a sustain support you must always support your team as a tank support you be always tanking all your enemy team's cc and damage for your allies