The League of Legends Tier List of April 2021 splits the champions in five tiers based on their popularity and ban rate at Diamond, Master, and above. All regions are considered.

Riot Scruffy talked about the status of Snowball in League of Legends, and published graphs illustrating how snowballed a game is in seasons 7, 8, 9, and 10.

League of Legends developers Meddler and Scruffy talked about the popularity of top lane, its impact, and their plans and goals for the future.

The graphs shared by RiotMeddler show the Blue and Red side win rates in Ranked Solo/Duo during Season 9 and 10. Official data by Riot.