Place these girl groups in tiers based on popularity today: NewJeans, LE SSERAFIM, IVE, aespa, Itzy, StayC, Billlie, Weeekly, (G)-IDLE, NMIXX, VIVIZ, Loona, fromis_9, Kep1er
These 4th gen girl groups have all had a burst of popularity recently (within the last 2 years). Now rank them where they stand!!
1st tier - the most popular, has caught the eye of especially S. Korea, established or building strong fanbase
2nd tier - Not quite on the level of the most popular but pretty popular. They still need to have been popular among Korean listeners
3rd tier - Popular. Not as popular as the other tiers but not anywhere near really nugu either. Have to have somewhat of a large and loyal fanbase.