From the Super Mario Wiki, the Mario encyclopedia
Zip-Line Vines are objects encountered in Donkey Kong Country: Tropical Freeze. They are inclined vines that stretch over long distances and, as their name implies, function like zip-lines. They are first seen in Zip-Line Shrine, but are also common in Wing Ding.
The Kongs can grip and quickly slide along a Zip-Line Vine over wide chasms and swarms of enemies. The characters can leave the vine at any time by jumping or simply dropping from it. By pressing the Ground Pound button, players can make the Kongs spin around the vine. The move can be performed to ring rows of bells and trigger a certain occurence, such as the appearance of items or another Zip-Line Vine, or the destruction of some incoming obstacles.