In this video, we explain what Sidechains are in the Crypto universe, including some examples like the Roostock (RSK) and Polygon blockchains. Essentially, Sidechains are seperate chains attached to a larger main chain through a two-way peg. Learn more about them here: https://whiteboardcrypto.com/what-are-sidechains/
What are Sidechains in Crypto? Rootstock + Polygon Explained!