1. What does it mean?
끌올 shortens 끌어올리다, to pull up. It marks a bump, repost, or renewed mention of existing information so people see it again.
Also written or said as 끌어올림, kkeurol
2. The nuance
How a post is actually bumped depends on the platform. The label does not grant permission to repost someone else's work, and repeated bumps may breach community rules.
3. Examples
“모임 신청 마감이 내일이라 공지 끌올해요.”
Bumping the notice because registration closes tomorrow.
“지난번에 정리한 준비물 목록을 끌올했어.”
I brought the packing checklist I made earlier back up.
Sources
References support the meaning and usage. Example sentences are written for NoCapWiki.