Who am I
I'm Platinum support main (started from SS6 - NOW) in Thai sever

1.You're CC support that's mean u're tanky so don't hide behind your ADC
2.Don't leave from your ADC until you and your ADC LV.6(Have Ultimate) that's you can roam
3.Make sure your team have good vision in mini map
4.If you want to roam make sure you can make kill or assist to that lane(don't feed in that lane)
5.It's a good thing if your ADC is your "DUO"

Pros
-Tanky
-haveCC
-Useful shield
-Can buff armor and magic resist/color]

Cons
-Low movemaent speed
-Use your hand speed for protect your adc from fast animation skill

Passive:
Concussive Blows
Braum's basic attacks and Winter's Bite each apply Concussive Blows to his target for 4 seconds, stacking up to 4 times. Once the first stack has been applied, any allied champion's basic attack on the target generates an additional stack.Upon reaching 4 stacks, the target is Stun for 1.25 / 1.5 / 1.75 seconds and takes 26 - 196 (based on level) magic damage.

Q:
Winter's Bite
Braum propels ice from his shield in the target direction, dealing magic damage to the first enemy hit and slowing them by 70% decaying over 2 seconds.

W:
stand behind me
Braum dashes to the target ally, positioning himself between them and the closest enemy champion, gaining bonus armor and bonus magic resistance for 3 seconds. If his target is a champion, they also receive the same bonuses.

E:
unbreakable
Braum raises his shield in the target direction, creating a barrier that intercepts incoming non-turret enemy projectiles and reduces the damage he takes through the shield. The first instance of damage blocked by his shield is negated completely.Unbreakable
ACTIVE: Braum raises his shield in the target direction, creating a barrier that intercepts incoming non-turret enemy projectiles and reduces the damage he takes through the shield. The first instance of damage blocked by his shield is negated completely.
While his shield is raised, Braum also gains 10% bonus movement speed

R:
Glacial Fissure
Braum leaps into the air and slams his shield into the ground, creating a fissure in the target direction that deals magic damage to enemies as well as those around him.

MAGIC DAMAGE:
150 / 250 / 350 (+ 60% AP)
Enemy champions hit in the close vicinity are Airborne icon knocked up, while enemies hit in the line are Airborne knocked up for 0.25 seconds.
If no enemy champions are hit in the point-blank area, the first enemy champion hit in the line is Airborne knocked up for the full duration.

A field of ice then remains at the fissure's location for 4 seconds, Slow slowing enemies within, persisting for 0.25 seconds.

Credit: http://leagueoflegends.wikia.com/wiki/Braum

Flash: Always choose it
Exhaust: when you face assasin in team fight such as Zed,Talon
Ignite: if you fight with sustain enemy or think exhaust is useless
Heal: when your ADC choose Barrier

Q-main skill in lane
E-Use for protect
R-Good skill in team fight
W-Buff team mate but you have to stand in front them

-Yasuo( Last Breath + Glacial Fissure)
-Lucian( Lightslinger + Concussive Blows)
-Ezreal( Mystic Shot + Concussive Blows)
-Miss Fortune( Bullet Time + Unbreakable)
-Twitch( Spray and Pray + Unbreakable)

See the pictureI usually ward 1 2 5 in early game (Lv.8+ I prefere to ward blue enemy side )
Credit: https://blog.gamersensei.com/article/warding-101-guide-bot-lane-league/

Just use Winter's Bite(Q) for slow your enemy and farming if you ganked by enemy jungler
you can use your Stand Behind Me(w)jump to your minion / ally

You have the best muscle so you're front line use Unbreakableyour sheild for save allies it's depend on situation

Blessed with massive muscles, and an even bigger heart, Braum is a beloved hero of the Freljord. Every child born to the ice knows of his legendary strength, capable of felling entire forests of frost-oaks in a single night or rending the very mountains asunder. With a colossal vault door borne across his back as a shield, Braum roams the land as a friend to those in need and a terrible foe of evildoers.
Credit: https://universe.leagueoflegends.com/en_US/champion/braum/
Braum theme song: https://www.youtube.com/watch?v=qHfDPCIn2HQ

Thank you every one for reading my guide if I have somethiing wrong please tell me my English some word or some grammar isn't correct 100% because English is not my mother tongue
next guide I'll make it better I promist.