2nd interview

I am hoping someone can help me out on this issue. I applied for an unpaid internship for an M&A consulting firm. A week later I had a 30 minute phone interview, which I think went well. This morning they emailed me to an "informational group interview." I don't know what this is. When I Google "informational interview" it states that it is basically a student asking questions to someone who has a job they desire, but it does not involve someone seeking that specific job. This is clearly not the case for me because I applied for the postion and was already interviewed. So does this mean I have the job and that the informational interview is for the employer to convince me to work there, considering it is unpaid.

Any advise or answers would be greatly appreciated, thank you.