First of all, let's take a look of the successful girl groups that debuted from 2014 to 2016
They will be included in this post if they, at least, fulfil one of these standards:
1. Their songs are charted monthly in Gaon Chart
2. They've sold more than 50,000 copies in the first week of the release
2014
1. Mamamoo
2. Red Velvet
3. Lovelyz
2015
1. GFriend
2. Oh My Girl
3. April
4. Twice
2016
1. WJSN
2. Black Pink
3. Momoland
There are a lot of girl groups that debuted after 2017
However, only three of them succeeded in gaining public's attention
2018
1. G-IDLE
2. IZONE
2019
1. ITZY
-What's your definition of 'successful'?
-I think it's even more harsh for boy groups...
-I personally think Weki Meki, Dreamcatcher, and Ever Glow survived this industry, though...
-But hasn't it always been like this?? Out of all the idol groups debuted in one year, only one or two of them that survived and the rest are just kind of... buried.
-It is true that this industry is getting tougher and tougher as the time passes by, but it doesn't only apply to girl groups, boy groups have it tough too.
-I know right, I noticed that it seems to be very difficult for idol groups to hit big these days
-That's true, but I think as long as the members are talented and the songs they release are in high-quality, they're going to hit big..
-You have to watch over a group for at least 3 years before deciding if they flopped or not. It's hard for idol groups to hit big as soon as they debut, unless if they're from big companies
-There are a lot of idol groups that takes quite some time after their debut to hit bigㅋㅋ Even some of the groups mentioned in the post experienced that...
-I had no idea Mamamoo and Red Velvet debuted in the same year...
-The groups listed in this post are all from well-known companies...
-I noticed that April has quite numerous achievements, besides, Naeun is really popular lately...
-It takes some times for idols to hit big these days, we don't know anything for sure before it happens
-What is the standards for this post? Sales??
-ITZY is really amazing, it hasn't even been that long since they debuted