But after placements, players could only queue together for Ranked Flex if all of them were within one division of each other. When it came to Placements, you could queue with anyone you wanted, as the ranks were not determined yet.
In the past, Ranked Flex was much more restricted than it is currently. Ranked Flex is mainly intended for players that want to play with multiple friends and still have the ability to compete against players of similar skill. Ranked Flex is less popular than Ranked Solo among players that prefer to grind the game solo. The other one is Ranked Flex which allows you to queue up with multiple people and play as a pre-made team.
One of them is Ranked Solo which requires you to play alone (as the word solo implies) or with a duo partner until a certain rank.
League of Legends has two main game modes for its competitive ladder.