Liabilities or Expenses???

[Daniel R. Bastreghi (D. Bastreghi - Transformando sites em negócios)]

Hello,

 

I installed GnuCash few days ago. I already read the documentation, but I
have a simple doubt:

 

What is the difference between expenses and liabilities? When I use each
one? It’s not clear to me.

 

Thanks a lot.

Daniel R. Bastreghi