How to calculate a delta?

Hello there, I'm interested in learning more about calculating the delta in the world of cryptocurrency and finance. Could you please elaborate on the process of determining the delta? What exactly is a delta, and why is it important to calculate it? What are the steps I should follow to make this calculation accurately? Also, are there any tools or resources that can assist me in this process? I'm looking forward to gaining a deeper understanding of this topic, thank you in advance for your insights.