noun, noun which may take the genitive case particle 'no'
sudden surge; rapid rise
Used for a sharp, often dramatic increase in ranking, popularity, sales, or fame. Often seen in news headlines and commentary.
The song surged rapidly after its release and quickly reached number one on the charts.
Sales of the new product are skyrocketing.
急上昇 is a general term for a sharp rise; 赤丸急上昇 adds a nuance of being marked with a red circle, implying a standout or highlighted surge, often used in rankings or trending contexts.
Compound of 赤丸 (red circle, often used to mark something noteworthy) and 急上昇 (rapid rise). The red circle likely comes from the practice of circling a sharply rising graph or a highlighted item in a ranking.