Blockchains are decentralized systems that allow for transactions among parties to be securely processed without the need for a central intermediary, such as a bank in the case of currency exchange. Since the inception of Bitcoin (the first implementation of blockchain) in 2009, considerable advancements have been made in the field of blockchain, spanning applications to software development, gaming, and digital artwork. In parallel, queueing theory, a field of applied mathematics and statistics, which studies the efficiency of waiting lines, has been used for understanding the dynamics of blockchains, albeit with limited applications in the literature. Readers without exposure to these fields will develop a grasp of blockchains and queueing models and learn how the intersection of these fields is studied in the literature. This article lays groundwork for readers to understand the future literature in these fields.