No matter if you are in a formal internship or employed outside of the coporate space, this is your opportunity to demonstrate to your employer what you have to offer their organization. It is easy to dismiss a tedious or boring assignment as a waste of time or intelligence, but I encourage you to view it as a great moment to earn the trust and confidence of your boss.
Each work experience is an opportunity to build or enhance on a transferrable skills set. No matter how small or mundane the task it is your duty to perform it to the best of your ability.
Despite your disdain for a particular task remember to be professional at all times. Seek out new challenges and tasks. Go above and beyond. Based on your performance your employer may decide to hire you in the future for more challenging tasks and/or provide you with a stellar recommendation for a greater opportunity.