How champion types work in laymens terms

ADC - i build damage and deal damage, I don't give a fuck about trying to get the kills. If you are in my range you are going to get hammered by extreme sustained damage. I typically build 6 offensive items. The other players can handle my defense.

ranged adc - I'm the star! PEWPEWPEW I do stuff from range then from even longer range. I push down towers like mad BOOMBOOMBOOM. So what if they escape, I want that nexus!

melee adc - wtf rito gime moar defense, I want to build nothing but offense but it doesnt always work out. Luckily I usually get some sort of bullshit defensive ability like a 75% damage reduction on a heal, 5 seconds of immortality, oranges that let me escape CC, or shit I might even just decide I'm immune to everything and stun anybody who tries to hard cc me huehuehue. I'm alright in teamfights but holy shit, try and duel me motherfuckers!

assassin - I kill shit... that's what i do. I kindof get towers but mostly I kill shit. Halfway across the map? I keel yew. Behind your wanna be tank that's actually a fighter? I keel yew. Lol you thought garen was a fucking tank, jokes on you! I'm slashn and dashn, not even gonna stick around long enough to fuck around with your shit tank pick. POOF im gone in an instant or sometimes I'll just dash out. Dont even need a ward woopwoop bitches! My damage is heavy as fuck and I'll probably cripple you just to make sure you don't do shit. I don't care if you get away a few times. My job isnt to kill you, its to get rid of you and disable you. Killing you is just something I happen to do.. ALOT

fighter - Gimme dat ass! I'm buff I'm tough even when I'm not. No shield? fuck it I'll scale my defense with this massive sword here fuck yeah! I'm not here to finish you quick sometimes. Maybe I can, whatever. Sometimes I deal as much damage as an assassin or more, sometimes I tank more damage than a tank or more. NOT EVEN TANKS CAN GET AWAY WITH TAKING AS MUCH DAMAGE AS ME! I am the fighter champ FIGHTER CHAMP FIGHTS YOU ALL NIGHT LONG

tank - I'm not always the tankiest, my damage isnt great. But I don't need either. My job is to take enough damage that I can deliver my payload. I am the tank. think of me like an actual tank. I hit hard and disrupt and I will defend you, occasionally I can even fight. My job is to zone them out and control their focus. Unlike the fighter I can actually protect you even against an assassin at times and I scale better with items that help with this cause. My design is one that makes any fight a possible victory no matter how far behind I am. If I can just reach a point of strategic significance and hold it for a moment I'll show you what real tanking looks like, even with 6 bloodthisters I am STILL a tank. My kit is not designed to scale great with items necessarily.

support - I'm a budget builder, like the tank I don't necessarily scale that great with anything, I don't need to. But I tend to have more utility or offense.. sometimes both. My job is to make other champs broken at opportune times. I enchance and disrupt. I can also help you against assassins but I myself may fall victim. Remember me! I tend to care for champs that have shit early games then go find a champ to combo with or stick with that same champ who needs some teamwork to function. Since I use a budget building strategy I am very vulnerable so I avoid gathering too many kills usually. I communicate, call shots, and manage vision. Since I manage the vision I usually get to make calls and coordinate the team around the vision I place! I wont usually be the initiator but I can usually enhance any team strategy including the initiation and I can do a good job peeling for people like melee adcs who get stuck without a trick to escape.

mage - BOOM WENT THE DYNAMITE! I bring bursts of explosive power that deals OP damage but its usually spread out. My damage is fucking massive, the only way youre gonna out damage me is if the opponents avoid me all game and I can't keep up... oh well... I don't do the most damage every game but when I do deal damage I DEAL FUCKING TONS. I am your A - BOMB sometimes I just focus one target but even then I cripple the shit out of them. I don't care if its a tank or an adc I'll nuke them all and their minions too. If I can't nuke em up I'll lock them down and burn them and slow the fight down so I can nuke them twice and thrice and qua..d..rice!

but then you have hybrids. i wont do them all but I'll do some of them.

fighter adc - "I live behind enemy lines" i fight you, i kite you, i juke and outpace you. I can take a hit even though I'm a ranger. I'll pound you and lock you down, you wont escape from this fight bro. You wont juke me I can see everything, I love wards but I don't always need them. I'm tanky enough to make crazy plays too. BOOM youre in the middle of my team bro and i'm in the middle of yours, may as well fight me bro MAY AS WELL FIGHT ME BRO LETS DO THIS SHIT! PEWPEWPEW

assassin adc - "Hitting me is like boxing with shadows!" I'm moble, swift, aggressive, and evasive. I penetrate your team defenses and then penetrate you! I AM THE NIGHT

support adc - "no really put this apple on your head" I'm not gonna do much to you, but when I do you'll know it. I set you up for #BIGLCSPLAYS, nothing gets past me bruh. Someone thought they could shit on me with pre-rework kass during the worlds finals. Boy were they wrong, especially with a fulltime support backing me up. I'll lock you down even without casting a single spell because you know you cant ignore my bullshit utility.

mage/caster adc - my aa is funny but my spells are rapid and gross, if I have mana watch out pewpewpew zapbangboom NO SCOPE FROM DOWWWWWN TOOOOOWWWWN who needs a map! I'm usually either kindof mobile or get some other goodies to suppliment my lack of really strong autoattack steroid.. or sometimes my abilities include some really bullshit steroid woot!

fighter assassin - .. i'm kindof a sub par assassin but unlike the assassin im not going to run just because you punch me in the nose, I'll fite you good asshole! try me! I'll find you from across the map come at me bro! Lol you brought your friends? I'll just force them away from you and 1v1 you in the middle of your team EAT SHIT! when its finally time for me to die I'm gonna pull some stupid shit just wait for it lol. You'll see why I'm the most rage inducing champion type in the game!

mage assassin - I do less damage or have less utility than assassins but my utility and stuff are out of this world! its usually a little limited but I do pretty broken shit. I have some of the most unique abilities in the game. As compensation though I usually get to also nuke your team. I WAS AND MAY STILL BE THE ONLY CHAMPION TYPE EXPLICITLY BALANCED AROUND RISK VS REWARD but most people don't notice this.

tank support - I stun, I disrupt, I style. I am.. simply outragous! I taunt the assassin and adc, I shit on their strategies and force them to new extremes. I do things no champ should be allowed to do. Fuck the rules, I'm fabulous! 3v1 dive on the other side of the map? nonono not today supersentai ninja GOOOOO

mage support - I'm just going to support them by shitting on you. No I'm literally just gonna roll my head on the keyboard even if I am a champ that can be played skillfully. Know why? Because I'm here to outstrategize you with brute force. Fuck your bullshit. Pure support may have had trouble dealing with that but Imma shred yo couch!

fighter support - Nope.. nope... nope... nope... nope... nope... nope.. nope... nope... nope... nope.. maybe... just kidding nope. Fun is forbidden.

mage fighter - I am tanky mage. I am ready for battle. I cannot be stopped. I lock you down, I ignore your damage, I blow you up. If you focus me someone else might lock you down or blow you up. I march on you with spells of doom. The more of you I have to damage the more I gain. If I am on the enemy team you better hope you've got some serious damage or an assassin to remove the ones supporting me.