People consume large quantities of meat every year.
The consumer should read the labels on the food products carefully.
Elephants consume about 250 k.g. of grass a day. They are great consumers of grass.
A small car consumes less fuel than a large one.
Our products will make the consumers happy.
customer on the other hand means the person who regularly deals with a certain shop. = buyer
Our shop has lots of very rich customers.
We lost some customers because our prices are high.
User is a peson who uses anything. You use yahoo or google, but you subscribe t a magazine, newspaper, etc. and usually pay money for it.
Road users should obey the traffic rules.
Subscribers to our newspaper will get ten free issues.
I hope I was of some help.