Divergence of $\sum_{n=1}^{\infty} \frac{\mu(n)}{\sqrt{n}}$: need further clarification

I see the following answer but am unable to understand it. Is someone able to add more steps clarifying it further? BTW, I added a duplicate question because I couldn’t add a comment for the original answer. Not enough reputation. Thanks!

Is it possible to show that $ \sum_{n=1}^{\infty} \frac{\mu(n)}{\sqrt{n}}$ diverges?