What's the difference between total supply and max supply?

I'm curious to understand the distinction between total supply and max supply in the context of cryptocurrency. Could you elaborate on how these two terms differ from each other? What does each one signify, and how do they impact the value and scarcity of a particular digital asset? Additionally, are there any scenarios where a cryptocurrency's total supply might change over time, or is it generally fixed? I'm eager to gain a clearer understanding of these concepts to better navigate the world of crypto finance.