Straightforward about the roles of the job and prior experience. Why you would be a good fit for the position. Background information on you. Can also ask any relevant questions you might have that come up.

Not sure if the disorganization and discourtesy [to follow up] was unique to the recruiter or a reflection of the organization's culture. - Had a phone interview with the recruiter, but I couldn't hear half of what they were saying because they were in a very noisy environment (it honestly sounded like a party was happening in the background). - Was told that the next round would be a Zoom meeting, but a Zoom link was never set out and instead it defaulted to another phone interview which resulted in the interviewer's tardiness due to the mix up. - The interviewer seemed to suggest that I'll be speaking with the team in the next round of interviews at the end of the conversation - And then they ghosted me despite follow ups requesting status and feedback.

First stage was easy, technical challenge was difficult . Had a few days to prepare a proposal in advance and present it back along with a data analysis challenge which you were not able to prepare for