How do I categorise customers in Zoho CRM?

How do I categorise customers in Zoho CRM?

We have many different types of customers for the same products. It would be useful if there was a way of categorising customers so that we could report on invidiual customer groups.
There does not seem to be this option, but I am a new user so I might be looking in the wrong place. Is this possible?
 
Thank you!