This article will explore the background and foundational knowledge of restaking. We will delve into the core concepts of restaking, elucidating its significance and mechanisms. Additionally, we will analyze the concept of data availability and examine its role in blockchain technology. Throughout the article, we will provide the first example to illustrate the practical application of restaking and reveal its potential impact on the future of decentralized finance. Furthermore, we will predict and analyze the challenges that may arise as restaking continues to evolve, paving the way for further research into this emerging aspect of the cryptocurrency field.