The video tutorial explains how to use assertions in coding, focusing on Ethereum's currency, Ether, and its smallest unit, Wei. It demonstrates how to test conversions between Ether and Wei using assertions, ensuring the code functions correctly. The tutorial emphasizes understanding the relationship between Ether and Wei and the importance of testing in coding.

What happens if the assertion is incorrect when testing with three ethers?

What steps are suggested to test the functionality of solidity in relation to ether and waves?