I had 3 phone interviews in all. The first was a general interview about the hiring process and position with an HR coordinator. The second occurred about a week later. It was with an employee in the department of the position. I was then asked to write 3 essays - they gave me a choice of 5 prompts I think. Once I submitted that, I had another phone interview. The5 interviews were all pretty casual and conversational. A couple weeks after my third phone interview, they emailed me to tell me they wanted to fly me out to the Mountain View HQ for interviews. I did not receive any prep for these. They flew me out within a week, rented a car and booked a hotel room for the night. I think I had about 5 rounds of interviews with team members. Like the phone interviews, these were pretty conversational --- no quizzes or anything. A lot of convo about my past experiences and what I thought of the company, what I could offer, etc. Although I thought they went well, I was not offered a job.