She seems to be a Youtuber who does ASMR Videos..
She looks exactly like how Taeyeon looked during her early debut days..
And the comment sections are 90% filled by comments saying about her strong resemblance to Taeyeon instead of talking about her ASMR videos
Like this..
[+271][-27]
1. [+98][-7] Crazy.. I'm Taeyeon and I thought the OP was just joking around at first.. She really does look like Taeyeon..
2. [+49][-5] I thought she was Taeyeon for a second..
3. [+43][-5] I thought the girl in the thumbnail was Taeyeon, so I clicked the postㅋㅋㅋ
4. [+22][-0] It's like Taeyeon's face with smaller facial features..
5. [+19][-3] She really does look like Taeyeon..