应援 activities include: buying albums to boost chart rankings, funding LED billboard ads, organizing color-coded lightstick displays at concerts, streaming music videos on loop, and crowdfunding birthday projects. A core part of 饭圈 culture.
usage
Can be noun or verb. '应援色' = fandom's official color, '应援棒' = lightstick, '应援物' = fan merchandise/gifts distributed at events.