What do you consider a 'customer'?

Hi all,

I am just about to submit but have 1 question left on my Assessment - Give an example of when you sought to understand and meet a customer's needs

I am stuck as to whether a customer is internal stakeholders or external customer. throughout the rest of the materials it specifically references stakeholder so I maybe overthinking it but it is the last question! 

Any help how you interpret would be great!