The Energy industry is one of the largest sectors in the world in terms of dollar value, generating an estimated $5 trillion in global revenue as of 2022. Oil is crucial to the global economic framework, impacting everything from transportation to heating and electricity to industrial production and manufacturing. Investors looking to enter the Energy industry can quickly be overwhelmed by the complex jargon and unique metrics used throughout the sector. This introduction is designed to help anyone understand the fundamentals of companies involved in the Energy sector by explaining key concepts and the standards of measurement.