You may be asked to explain what IEEE is. Depending on the time you have available, here are some short responses:

The 1-line response:

IEEE is the world's largest professional association advancing technology for the benefit of humanity.

The 15-second response:

IEEE is the world's largest professional association advancing technology for the benefit of humanity. It publishes technical journals, sponsors conferences, develops technology standards, and supports the professional interests of more than 400,000 members.

The 30-second response:

IEEE is the world's largest professional association advancing technology for the benefit of humanity. It publishes technical journals, sponsors conferences, develops technology standards, and supports the professional interests of more than 400,000 members. IEEE creates an environment where members collaborate on world-changing technologies—from computing and sustainable energy systems to aerospace, communications, robotics, and healthcare—to engineer a better tomorrow.