I am a final year undergrad and applied for graduate programs in various universities for Fall'16 admission. I recently got an admission offer from one of the programs. The admissions chair cc'd the offer email to potential supervisors I mentioned in my application. Here's the email from one of these potential supervisors. Dear xxx, just to follow on Dr. xxx's invitation to xxx University: I was very impressed with your record and ambition, and would be very interested in having you join my group. I am looking for very motivated and strong students at the moment. I have been working on various aspects of xxx, with my students and postdocs at xxx University, and in collaboration with colleagues in xxx University and xxx University. You can read about my recent research at my webpage: xxx or check some of my papers on the google scholar: xxx Please let me know if you have any questions about living and studying here in xxx. I think we have a very lively and a friendly department, in spectacular surroundings. Very best from xxx. This is my first admission offer, so I'm waiting for offers or rejections from other places. So, I'm not really sure how to respond. And even if I did want to work under his supervision, what questions do I ask to begin with? I'm totally lost.