I need to know when to use "es" versus "esta"
When do I use "es" versus "esta"?
¿Cómo es? means what is he/she or it like: ¿Cómo es tu marido? es alto mareno y guapo. He is tall, dark and handsome, ¿Cómo es tu habitacion? es moderno. and those are exampñes using the verb ser which is to be, on the other hand ¿cómo está? means how is he or she, ¿Cómo estás? means how are you? just to name a few examples and here you are using the verb estar which also means to be, but to fully understand when to use ser and when to use estar you need to look it up and study it on this site, just go to the top of this page clic on more and then reference in the drop down menu.
In Spanish there are two "be" verbs: ser and estar. I reccomend this article as well as Paralee's lesson about ser and estar.
If your'e saying "How are you?" to someone, ¿Cómo es? is the informal version, for if you are familiar with the person, and ¿Cómo está? is the formal version, for if you aren't familiar with the person. Apart from that, try the link above! I hope this helps!