Intro

Teamfight Tactics, or TFT, is an 8-player, free-for-all strategy game and an autobattler using champions and their abilities in League of Legends(developed by the same company). It is like chess in some ways, which is why TFT is also called an "auto-chess" game.
The goal of the game is to get all of your opponents to 0 health by winning rounds with your units.

How the Game is Played

There is an initial carousel stage, where 9 units spawn with item components, like a sword or bow(there are exceptions, such as the special carousels that can give everyone the same components, or even a full item.)
In Stage 1, after the carousel, there are 3 rounds of minions, which may drop a random amount of gold, items, and sometimes units.
The rest of the stages follow the same structure, and in Stage 2-1 you finally face someone else after a preparation phase(this phase happens every round before player/monster fights).
The round structure, except stage 1, is: rounds 1, 2, 3, 5, and 6 are rounds where your board faces another board; round 4 is another carousel round, with units in a carousel and an item, just like the start of the game; round 7 is a round you face monsters or a monster in order to get more items and gold.

Gold and the TFT Interface

Gold in this game buys you units, refreshes your shop, or buys you XP to take to the next level in hopes of finding better units and to put more of them on your board.
Gold can be earned after each round, determined by how much gold you have, and how many rounds you have been winning/losing in a row(known as streaking).
Alternative ways to get gold is winning a round(beating your opponent), an origin that will be brought up in Basics, and a Galaxy that will be brought up in Basics as well.
In every round, everyone gets 5 units that you can buy/sell in order to upgrade current units, fill out synergies, or counter opponent's boards. Newly bought untis are placed on your bench unless your bench is full.
There are 2 buttons on the left side of the shop, reroll(costs 2 gold and shows 5 new units) and buy XP(which costs 4 gold to buy 4 XP). There is a bar showing XP progress, and each level requires a different amount of gold(level is capped off at 9, gold is not capped). Your current gold total will be shown on top of the shop.
Units(which will be explained more in Basics) can be placed on your board, with the number of units corresponding with your level, or your bench, with a maximum of 10 units on the bench.
The unit's synergies will count for the units on the board only, as those units will be the units in combat.

Luck

I feel like I have to address the luck in this game. There is a stigma about this game where's 100% luck.
Yes, this game has a lot of luck-based elements, such as what items drop from monsters or champions you get in your shop, but it is what you do with what you get(in this case getting items or champions you may not want) that makes you a good TFT player.